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以环氧氯丙烷(1)和NaHSO3为原料,Na2SO3为引发剂,乙二胺四乙酸二钠(EDTA2Na)为络合增效剂,经酸催化开环反应合成了磺酸型两性表面活性剂中间体--3-氯-2-羟基丙磺酸钠(2),其结构经1H NMR, IR和ESI-MS确证。在最佳反应条件[1 0.55 mol, n(NaHSO3): n(Na2SO3): n(EDTA2Na): n(H2O)=1.00 : 0.04 : 0.01 : 9.50, 1的滴加时间15 min,在适宜的转速(前期100 rpm, 后期300 rpm)下,于70 ℃(浴温)反应1.25 h]下合成的2,收率81.55%。并对反应机理进行了推测。 相似文献
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本文对邻三氟甲基苯甲酸的合成工艺进行了研究。邻三氟甲基苯甲酸以邻氯三氟甲基苯为初始原料,通过Grignard,加成和水解三步反应得到。该反应条件温和可控,总收率41.3%,纯度高达99.5%以上。该方法所得目标产物邻三氟甲基苯甲酸纯度高、成本较低、易操作,相对比较适合工业化生产。 相似文献
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以8-羟基喹啉为原料,通过Reimer-Tiemann反应合成了5-甲酰基-8-羟基喹啉(收率15.0%)和7-甲酰基-8-羟基喹啉(收率21.5%),其结构经1HNMR和IR表征。 相似文献
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1 INTRODUCTION The title compound, (3aS,6aR)-1.3-dibenzyl- tetrahydro-1H-thieno[3,4-d]-imidazole-2(3H)-one- 4-ylidenepentanoic acid 3, is a key intermediate for the synthesis of d-biotin 1 (VITH, Fig. 1) which has been widely used not only as a pharmaceu… 相似文献
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Using 3,5‐bis(trifluoromethyl)bromobenzene and methyltrimethoxysilane or tetraethoxysilane as raw materials, novel trifluoromethylphenyl silanes were synthesized via Grignard reaction and substitution reaction, and the molecular structure of silane products was characterized by NMR, FT‐IR, MS techniques and elemental analysis. The reaction result showed that the reactivity of Grignard reagent was different in THF and diethyl ether when subjected to substitution reaction, which gave three products with different substitution degree. According to the current work, mono‐, di‐ and tri‐substituted product can be obtained selectively from the same reactants by controlling the reaction condition. 相似文献
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Alkyl sulfoxides were synthesized in good yields from the reaction of alkanesulfinyl chloride with Grignard reagents in the presence of zinc chloride. 相似文献
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Siddharth Roy Anubha Sharma Soumyaditya Mula Subrata Chattopadhyay Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(7):1713-1722
Tuning in : The reaction of halocyclopentane organometallic reagents can be tuned by the choice of metal (see scheme). Cyclopentylmagnesium bromide reduces aldehydes and ketones to the corresponding alcohols. However, in the presence of ZnCl2, normal Grignard addition to the ketones gives tertiary alcohols with complete diastereoselectivity. These protocols were used in the asymmetric synthesis of two medicinally important compounds.