Properties and Reactions of Substituted 1,2-Thiazetidine 1,1-Dioxides: Alkylation and Acylation of 3-Haloalkyl β-Sultams and Synthesis of Bicyclic β-Sultams
作者:Peter Schwenkkraus、Hans-Hartwig Otto
DOI:10.1002/ardp.19933260802
日期:——
Alkylation of the 3‐chloroethyl substituted β‐sultam 1 with bromoacetates yields the N‐ and 3‐substituted β‐sultams 2; exchange of halogens affords esters 3. Reactions of 1 or of the analogues 8 with isocyanates make the carbamoyl derivatives 5, 6, and 9 available. While cyclization of 6 with n‐BuLi in the presence of HMPT yields the bicyclic β‐sultams 7, the analogous reaction of 9 failed. The bicyclic
3-氯乙基取代的β-磺胺1与溴乙酸酯烷基化产生N-和3-取代的β-磺胺2;卤素的交换得到酯3。1或类似物8与异氰酸酯的反应使氨基甲酰基衍生物5、6和9可用。虽然在 HMPT 存在下 6 与 n-BuLi 环化产生双环 β-sultams 7,但 9 的类似反应失败。双环β-磺胺12和14由3-羟烷基β-磺胺11和13和羰基化合物得到。所制备的β-舒坦均未显示出任何抗菌活性。