The Arbuzov reaction between conveniently substituted 1,3,2-dioxaphosphorinane and bromine gives an acyclic product. These reagents after condensation with primary amine and metallation have been converted to 2-oxo-1,3,2-dioxazaphosphorinane.
NMR and x-ray evidence for the chair conformation of six-membered rings attached diequatorially to five-coordinate phosphorus. Implications for reported transition-state analogs of nucleoside cyclic 3',5'-monophosphate hydrolysis
作者:Yande Huang、Alan E. Sopchik、Atta M. Arif、Wesley G. Bentrude
DOI:10.1021/ja00063a024
日期:1993.5
A series of phosphoranes, 5, 6a, 6b, and 7a, has been prepared and structurally characterized by 1 H NMR spectroscopy and/or X-ray crystallography. In the crystalline state, 5a, 6a, and 6b feature five-coordinate phosphorus bonded in a somewhat distorted, trigonalbipyramidal fashion. The phosphorus-containing six-membered ring is attached to phosphorus diequatoially and is in the chair conformation
已经制备了一系列正膦,5、6a、6b 和 7a,并通过 1 H NMR 光谱和/或 X 射线晶体学对其进行了结构表征。在结晶状态下,5a、6a 和 6b 的特征是五配位磷以稍微扭曲的三角双锥体方式键合。含磷六元环与磷二等位连接,呈椅子构象。1 H NMR 耦合常数表明,对于所有四种磷烷,在溶液中也存在椅子形环,而不是船形或扭曲构象
Spirophosphoranylation d'α-aminoacides—I
作者:Bernard Garrigues、Aurelio Munoz、Max Koenig、Michel Sanchez、Robert Wolf
DOI:10.1016/0040-4020(77)80303-7
日期:1977.1
New spirophosphoranes have been prepared by reaction of &alpha-aminoacids with tricoordinate phosphorus substrates. In one case, 1i, an equilibrium chain-cycle PIIIPv has been observed.
通过α-氨基酸与三配位磷底物的反应已制备了新的螺正膦。在一种情况1i中,已经观察到平衡链循环P III P v。
Cationic phosphoamphiphiles and thiophosphocholines derived from cetyl alcohol
作者:D. A. Predvoditelev、M. A. Malenkovskaya、L. K. Vasyanina、E. E. Nifant’ev
DOI:10.1007/s11176-005-0130-4
日期:2004.8
New representatives of cationic phosphoryl lipids and thiophosphocholines containing a cetyl radical have been synthesized.
A series of 1, 4-dihydropyridine-5-cyclic phosphonate derivatives, designed as analogues of 1, 4- dihydropyridine-3, 5-dicarboxylate calcium antagonists, was synthesized and examined for antihypertensive activity. Several compounds were proved to have activities superior or comparable to that of nifedipine in lowering blood pressure in normotensive and spontaneously hypertensive rats (SHR). Among these compounds, methyl 2, 6-dimethyl-5- (2-oxo-1, 3, 2-dioxaphosphorinan-2-yl) -4- (2-nitrophenyl) -1, 4-dihydropyridine-3-carboxylate (31, DHP-218) was approximately 7 times more active than nifedipine in SHR and was selected for further development and clinical evaluation. The structure-activity relationships are discussed.