Synthesis and reactivity patterns of new proazaphosphatranes and quasi-azaphosphatranes ZP(MeNCH2CH2)3N
作者:Jian Sheng Tang、John G. Verkade
DOI:10.1021/ja00058a008
日期:1993.3
transannulation in S 2 CP(MeNCH 2 CH 2 ) 3 N (4) stabilizes this unusual CS 2 adduct; facilitating the synthesis of a series of RS(S)CP(MeNCH 2 CH 2 ) 3 N + cations from the reaction of 4 with RX (5, R=M; 6, R= CH 2 =CHCH 2 ; 7, R= Et; 8, R= n-Pr; 9, R= n-Bu; 10, R= i-Pr). The relative rates of formation of are in accord with S N 2 attack of sulfur on the a carbon of RX; The structure determination of
S 2 CP(MeNCH 2 CH 2 ) 3 N (4) 中的部分桥头 P←N 环化稳定了这种不寻常的 CS 2 加合物;促进从 4 与 RX 的反应合成一系列 RS(S)CP(MeNCH 2 CH 2 ) 3 N + 阳离子 (5, R=M; 6, R= CH 2 =CHCH 2 ; 7, R= Et;8,R=n-Pr;9,R=n-Bu;10,R=i-Pr)。的相对形成速率与硫对RX的a碳的SN 2 攻击一致;X 射线对 5(I) 的结构测定表明,从 4 形成阳离子 5 伴随着环间相互作用从 3.008 缩短到 2.771 A。我们还报告了一系列反应的区域异构产物的合成S=P(MeNCH 2 CH 2 ) 3 N (11) 与RX,即RSP(MeNCH 2 CH 2 ) 3 N + (R =Me, Et, n-Bu) 和S=P(MeNCH 2 CH 2 ) 3 NR + (R = Me