Synthetic analogs of natural flavolignans. IV. Synthesis of benzodioxocane analogs of silandrin and hydnocarpin

1,6-Benzodioxocane analogs of chalcones have been synthesized. From them have been obtained benzodioxocane analogs of silandrin and hydnocarpin. The PMR spectra of the substances synthesized are given and are discussed. Taras Shevchenko Kiev University, Ukraine. KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 490–493, July–August, 1994.     

Synthetic analogs of natural flavolignans. IV. Synthesis of benzodioxocane analogs of silandrin and hydnocarpin

1,6-Benzodioxocane analogs of chalcones have been synthesized. From them have been obtained benzodioxocane analogs of silandrin and hydnocarpin. The PMR spectra of the substances synthesized are given and are discussed.Taras Shevchenko Kiev University, Ukraine. KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 490–493, July–August, 1994.     

Synthetic analogs of natural flavolignans. III. Synthesis of 6-carboxy-1,3-benzodioxane analogs of silandrin and hydnocarpin

Chalcones containing a 6-carboxy-1,3-benzodioxane fragment and, from them, flavanone and flavone analogs of silandrin and hydnocarpin have been synthesized. The structures of the compounds obtained were confirmed by their PMR spectra.KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 484–489, July–August, 1994.     

Synthetic analogs of natural flavolignans. III. Synthesis of 6-carboxy-1,3-benzodioxane analogs of silandrin and hydnocarpin

Chalcones containing a 6-carboxy-1,3-benzodioxane fragment and, from them, flavanone and flavone analogs of silandrin and hydnocarpin have been synthesized. The structures of the compounds obtained were confirmed by their PMR spectra. KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 484–489, July–August, 1994.     

Synthetic analogs of natural flavolignans. II. A new synthesis of benzodioxepane analogs of silandrin and hydnocarpin

Benzodioxepane analogs of chalcones have been obtained from which analogs of natural flavolignans — silandrin and hydnocarpin — have been synthesized. The PMR spectra of the new substances are given and are discussed.KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 480–483, July–August, 1994.     

Synthetic analogs of natural flavolignans. II. A new synthesis of benzodioxepane analogs of silandrin and hydnocarpin

Benzodioxepane analogs of chalcones have been obtained from which analogs of natural flavolignans — silandrin and hydnocarpin — have been synthesized. The PMR spectra of the new substances are given and are discussed. KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 480–483, July–August, 1994.     

Synthetic analogs of natural flavolignans. I. A new synthesis of analogues of silandrin and hydnocarpin

The synthesis of analogues of silandrin and hydnocarpin from 2′-hydroxy-3,4-ethylenedioxychalcones has been achieved.     

Synthetic analogs of natural flavolignans. I. A new synthesis of analogues of silandrin and hydnocarpin

The synthesis of analogues of silandrin and hydnocarpin from 2-hydroxy-3,4-ethylenedioxychalcones has been achieved.KIEN, Karakalpak Division of the Academy of Sciences of Uzbekistan. Taras Shevchenko Kiev University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 351–354, May–June, 1994.     

Synthetic analogs of natural flavolignans. V. A new synthesis of 6-halogeno-1,3-benzodioxane analogs of silandrin and hydnocarpin

6-Halogeno-1,3-benzodioxane analogs of chalcones have been synthesized by various methods. Flavanone and flavone analogs of silandrin and hydnocarpin have been obtained from them. The structures of the new flavonoids have been shown by their PMR spectra.KIEN Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 494–498, July–August, 1994.     

Synthetic analogs of natural flavolignans. V. A new synthesis of 6-halogeno-1,3-benzodioxane analogs of silandrin and hydnocarpin

6-Halogeno-1,3-benzodioxane analogs of chalcones have been synthesized by various methods. Flavanone and flavone analogs of silandrin and hydnocarpin have been obtained from them. The structures of the new flavonoids have been shown by their PMR spectra.     

Synthetic analogs of natural flavolignans. VI. Synthesis of analogs of silybin and dehydrosilybin

Analogs of silybin and dehydrosilybin have been obtained from 1,4-benzodioxane derivatives of chalcones, and their structures have been shown by their PMR and IR spectra.     

Synthetic analogs of natural flavolignans VII. Synthesis of 1,3-benzodioxane analogs of dehydrosilybin

Structural analogs of dehydrosilbyn have been obtained from 1,3-benzodioxane derivatives of chalcones. Their structures have been confirmed by their PMR spectra.Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 623–625, September–October, 1994.     

Synthetic analogs of natural flavolignans VII. Synthesis of 1,3-benzodioxane analogs of dehydrosilybin

Structural analogs of dehydrosilbyn have been obtained from 1,3-benzodioxane derivatives of chalcones. Their structures have been confirmed by their PMR spectra.     

Synthetic analogs of natural flavolignans. XII. Synthesis of 3,5-diarylsubstituted pyrazolines based on 1,3-benzodioxane and 1,4-benzodioxane chalcone analogs

3,5-Diarylsubstituted pyrazolines were synthesized by reaction of 1,3-benzodioxane and 1,4-benzodioxane chalcone analogs with hydrazine hydrate. The structures of the products were confirmed by PMR spectroscopy.Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 446–447, November–December, 2004.For part XI, see [6].This revised version was published online in April 2005 with a corrected cover date.     

Synthetic and modified isoflavonoids. IX. Synthesis of benzodioxolane and benzodioxane analogs of 3-arylcoumarins

Derivatives of derrusnin and also its benzodioxane and benzodioxepane analogs have been synthesized. The structures of the compounds obtained have been confirmed by spectral studies. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 226–230, March–April, 1994.     

Synthetic analogs of natural flavolignans VIII. Synthesis of 6-chloro-1,3-benzodioxane, 1,4-benzodioxane, 1,5-benzodioxepane, and 1,6-benzodioxocane analogs of 4-thioflavone

1,3-Benzodioxane, 1,4-benzodioxane, 1,5-benzodioxepane, and 1,6-benzodioxocane analogs of 4-thioflavone have been synthesized.Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 375–378, May–June, 1997.     

Synthetic analogs of naturally occurring flavolignans. XI. Reaction of synthetic flavone analogs with hydrazine hydrate and its derivatives

Reactions of 1,3-benzodioxane and 1,4-benzodioxane analogs of flavones with hydrazine derivatives are studied. The hydrazines recyclize the new flavones into 3,5-diarylpyrazoles. Their PMR spectra confirm their structures.Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 40–41, January–February, 2000.     

Synthetic analogs of naturally occurring flavolignans. X. Reaction of flavones and their thioderivatives with hydroxylamine

1,3-Benzodioxoles, 1,4-benzodioxanes, and 1,5-benzodioxepanes are flavone analogs that hydroxylamine recyclizes into derivatives of 5-(2-hydroxyphenyl)isoxazoles. They react with thioderivatives with retention of the pyrone ring and formation of oximes. Their structures are proven using PMR spectra.Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 37–39, January–February, 2000.     

Synthetic and modified isoflavonoids. VII. Synthesis of benzodioxocane analogs of pseudobaptigenin

Benzodioxocane analogs of pseudobaptigenin have been synthesized, and their structures have been shown by chemical transformations and PMR spectra.