and 4 chemical bonds, are reported for the 5,5-substituted-1,3-2-dioxaphosphorinanes (I: X = O or S; R1 = R2 = Me or Et; R1 = Me, R2 = ClCH2; R3 = alkyl, alkoxy, aryloxy, alkylamido, halogeno, H,). In some cases, the 4,6-methylene hydrogen resonances have been analysed by means of an ABX approximation.
质子化学位移,和31个P- 1个通过的1,2,3序列ħ偶合常数,和4个化学键,报道了5,5-取代的1,3-2-dioxaphosphorinanes(I:X = O或S; R 1= R 2= Me或Et; R 1= Me,R 2= ClCH 2; R 3=烷基,烷氧基,芳氧基,烷基酰胺基,卤代,H 1。在某些情况下,已经通过ABX近似分析了4,6-亚甲基氢共振。
Preparation of a 2-aralkyl-5,5-dialkyl-1,3,2-dioxaphosphorinan-2-one
申请人:Witco Chemical Corporation
公开号:US04420437A1
公开(公告)日:1983-12-13
A process for preparing a 2-aralkyl-5,5-dialkyl-1,3,2-dioxaphosphorinan-2-one by heating a 2-aralkyloxy-5,5-dialkyl-1,3,2-dioxaphosphorinane such as the novel 2-benzyloxy-5,5-dimethyl-1,3,2-dioxaphosphorinane, with a catalytic quantity of an aralkyl halide. The aralkyl halide can be recovered and recycled.
Unprecedented CP systems: Me3SiX (X=Br, I) catalyses rearrangements of PIII esters R′R′′POR into the corresponding phosphoryl systems, providing a simple, mild and efficient route to a variety of structures containing PC bonds. The mechanism has been found to be fundamentally different from that of the Arbuzov–Michaelis reaction and includes three definite steps a, b and c (see scheme).