Caged phosphorane with P-C bond based on chloral and 4,5-dimethyl-2-(2-oxo-1,2-diphenylethoxy)-1,3,2-dioxaphospholane

The key methods of caged phosphoranes synthesis are analyzed. Reaction of 4,5-dimethyl-2-(2-oxo-1,2-diphenylethoxy)-1,3,2-dioxaphospholane (prepared from the meso-form of 2,3-butanediol) with chloral has yielded the caged phosphorane containing a phosphorus-carbon bond: 1,1-(1,2-dimethylethylenedioxy)-3,4-diphenyl-6-trichloromethyl-2,5,7,1-trioxaphosphabicyclo[2.2.1^1,4]heptane; spatial structure of the product has been elucidated with X-ray diffraction analysis.

     

N-(5,5-二甲基-1,3,2-二氧杂己内磷酰基)取代苯甲醛腙的合成及其阻燃性能

环状磷酸酯;水合肼;膨胀型阻燃剂;N-(5;5-二甲基-1;3;2-二氧杂己内磷酰基)取代苯甲醛腙的合成及其阻燃性能     

N-羟甲基-3-(5,5-二甲基-1,3,2-二氧磷杂环己基膦酰基)丙酰胺的合成与表征

以甲醛(或取代苯甲醛)和丙烯酰胺为原料,经歧化,Pudovik加成和羟甲基化反应合成了一系列未见报道的N-羟甲基-3-(5,5-二甲基-1,3,2-二氧磷杂环己基膦酰基)丙酰胺,其结构经^1H NMR,IR和MS表征。     

Molecular and crystal structure of 2-amino-2-oxo-1,3,2-dioxaphosphorinane

A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 1, pp. 143–146, January–February, 1994.     

Stereoselective Synthesis of 2-Chloro-4-Substituted-phenyl-5,5-Dimethyl-1,3,2-Dioxaphosphorinan-2-(Thi)ones

1,3,2-DioxaPhoSPhorinaneringsystemhasbeenasubjectofconsiderableinterestformanyyearsbecauseofitSdiversebiologicalachvitieSIl'21andcomPlicatedstereocheAnstryl"'].AsacontinuationofourinterestinthesynthesisandstereochendstryoncycliCPhosPhoruscomPoundsl"'l,wewouldlilietorePOrthereinthestereoselechvesynthesisof2-chloro-4-subshtUted-phenyl-5,5-ddriethyl-l,3,2-dioxaPhoSPhorinan-2-(thi)ones,whicharethekeyintermediatesforthesynthesesofl,3,2-dioxaPhoSPhohaanederivatives.Generallyspeaking,2-chloro…     

2-苯羟甲基-5,5-二甲基-4-苯基-2-氧代1,3,2-二氧磷杂环己烷的合成及表征

以苯甲醛、异丁醛、三氯化磷为原料合成了新型的1,3,2-二氧磷杂环类化合物2-苯羟甲基-5,5-二甲基-4-苯基-2-氧代-1,3,2-二氧磷杂环己烷,总收率为40．8％,并对其进行了NMR研究和结构表征。     

Kinetics and thermodynamics of anionic polymerization of 2-methoxy-2-oxo-1,3,2-dioxaphosphorinane

Kinetic activation parameters and thermodynamic functions describing the reversible anionic polymerization of 2-methoxy-2-oxo-1,3,2-dioxaphosphorinane (1,3-propylene methyl phosphate) were determined. Enthalpy and entropy of the anionic propagation ? depropagation equilibrium were found to be close to those found previously by the present authors for the cationic polymerization, while the activation parameters of propagation and depropagation differ substantially for both processes and reflect the differences in the involved mechanisms. Thus, data for anionic polymerization (and cationic polymerization in parentheses) are: ΔH_1s° = ?0.7 kcal/mole (?1.1); ΔS_1s° = ?2.8 cal/mole-deg (?5.4); ΔH_p^? = 26.7 kcal/mole, and ΔS_p^? = ?6.1 cal/mole-deg. The polymers obtained have low degrees of polymerization (DP _n ≤ 10) because of the extensive chain transfer, leaving cyclic end groups in macromolecules. The presence, structure and concentration of the end groups have been determined by ¹H-, ³¹P-, and ¹³C-NMR spectra.     

N,N'-二(2-硫代-5,5-二甲基-1,3,2-二氧磷杂环己基)乙二胺的合成及阻燃性能

以新戊二醇与PSCl3合成2-硫代-2-氯-5,5-二甲基-1,3,2-二氧磷杂环己烷（DDSP）,再与乙二胺反应,合成了-种新型含有磷、氮、硫的阻燃剂：N,N’-二（2-硫代-5,5-二甲基-1,3,2-二氧磷杂环己基）乙二胺（DDPSN）,用元素分析、FTIR、^1HNMR、MS测试技术对其结构进行了表征。采用热重（TG）分析,研究了反应物摩尔比、缚酸剂及催化剂、反应温度对DDPSN产率的影响。结果表明,所合成的标题化合物结构与预期一致．其初始热分解温度大于290℃,在1000℃时仍有24．5％的残炭率。新戊二醇与PSCl3摩尔比为1．75：1时。DDSP产率高达85％,而DDSP与乙二胺摩尔比为1：1．25时,DDPSN产率为89％;采用4-二甲氨基吡啶（DMAP）作为缚酸剂的效果优于吡啶和三乙胺,其加入量为新戊二醇质量分数的1％时．可使DDPSN产率提高到92％,反应温度以0～5℃为宜。其阻燃粘胶膜实验结果表明,DDPSN在粘胶中质量分数为18％时,极限氧指数（LOI）值可达28％．是-种效果很好的阻燃剂。由阻燃粘胶膜燃烧后生成的炭残渣的扫描电子显微镜（SEM）可知,炭残渣表面有很多隆起的泡状物,且试样的断面为蜂窝状结构,表明该阻燃剂为膨胀型阻燃剂。     

乙交酯与2-氢-2-氧-1,3,2-二氧磷杂环己烷的开环共聚研究

聚乙醇酸及其与乳酸的共聚物是一类无毒、有良好的生物相容性和生物可降解材料,它们广泛地用作药物控释体系的载体,牙科植入材料［１,２］．但由于聚乙醇酸的高度可结晶性,使其不溶于包括三氟乙酸在内的几乎所有的有机溶剂,因此通过共聚来改进其物化性质的研究一直方...     

DL－丙交酯与2－氢－2－氧－1，3，2－二氧磷杂环己烷的开环共聚合研究

在三异丁基铝催化下ＤＬ－丙交酯与２－氢－２－氧－１，３，２－二氧磷杂环己烷开环共聚，制备了一类新型水溶性共聚物Ｐ（ＬＡ－ｃｏ－ＴＭＰ）。用１ＨＮＭＲ、ＩＲ谱对其结构进行了表征，并研究了催化剂用量及不同单体配比对总转化率、共聚物组成及特性粘度的影响。     

Crystal and molecular structure of 5,5-BIS(hydroxymethyl)-2-OXO-2-[l-(2-trifluoromethyl-3,3,3-trifluoropropioneamido)-1-trifluoromethyl-2,2,2-trifluoroethyl]-1,3,2-dioxaphosphorinane

The crystal and molecular structure of 5,5-bis(hydroxymethyl)-2-oxo-2-[1-(2-trifluoromethyl-3,3,3-tri-fluoropropioneamido)-1-trifluoromethyl-2,2,2-trifluoroethyl]-1,3,2-dioxaphosphorinane (I) - an effective inhibitor of phosphorolytic enzymes - has been determined by X-ray diffractometry. Crystals I are monoclinic: space group P2₁/c, a = 9.962(3), b = 20.468(3), c = 9.527(3) å, Β = 108.04(2)?, Z = 4; R = 0.061 for 3065 independent reflections with I ≥ 3Σ. In a sterically strained molecule I, the coordination polyhedron of the P atom is a distorted tetrahedron with an elongated exocyclic P-C bond [1.906(2) å]. The six-membered heterocycle of I has a distorted chair conformation with a significantly flattened angle at the P atom. In the crystal structure, molecules I are linked into centrosymmetric H-dimers by a pair of strong H-bonds of O-H...O=P type and also into infinite (along the z axis) chains by H-bonds of N-H...O = C and C-H...O = C type.     

Synthesis,Crystal Structure,and Flame Retardance of 2-(3-Silatranyl-Propylamino)-4-(2,4-Dichlorophenyl)-5,5-Dimethyl-1,3,2-Dioxaphosphinane-2-Sulfide

Abstract

2-(3-Silatranylpropylamino)-4-(2,4-dichlorophenyl)-5,5-dimethyl-1,3,2-dioxa phosphinane-2-sulfide 4 was synthesized by a nucleophilic substitution reaction of 2-chloro-1,3,2-dioxaphosphinane-2-sulfide 2 with γ-aminopropylsilatrane 3, which was prepared by the cyclization reaction of triethanolamine and γ-aminopropyltriethoxysilane. The structure of the title compound was confirmed by IR, ¹H NMR, ³¹P NMR, EI-MS, and elemental analysis as well as by single crystal X-ray diffraction and its thermal properties were studied by thermogravimetry (TG) and differential scanning calorimetry (DSC). Thermal analysis and preliminary fire retardance testing suggest that compound 4 should function as a good flame retardant.     

Conformational Analysis of 2-Methoxy-2-oxo-1,3,2-dioxaphosphorinane and Its Methylthio and Methylselenyl Analogues

Russian Journal of Physical Chemistry A - This research aimed at exploring the stabilities of the conformers of 2-methoxy-2-oxo-1,3,2-dioxaphosphorinane and its methylthio and methylselenyl analogs...