( E )-和( Z )-异氰基烯烃是通过乙烯基碘与甲酰胺的顺序交叉偶联,然后脱水选择性合成的。最佳催化剂由 Cu II和反式-N,N'-二甲基-1,2-环己二胺原位生成,可将 ( E )-或 ( Z )-乙烯基碘与甲酰胺快速偶联,从而最大程度地减少生成物的异构化乙烯基甲酰胺。该方法有效地提供了一系列无环、碳环和杂环异氰基烯烃;非对映体异氰基抗生素 B371 和E -B371 的选择性立体发散合成说明了其多功能性。
Reactions of 1-acylamino-1-(trimethylsiloxy)alkanes: versatile precursors to acylimines
作者:A. Peter Johnson、Richard W. A. Luke、Andrew N. Boa
DOI:10.1039/p19960000895
日期:——
1-Acylamino-1-(trimethylsiloxy)alkanes react with carbon and heteroatom nucleophiles to give the corresponding 1-substituted-1-acylaminoalkanes. The 1-acylamino-1-(trimethylsiloxy)alkanes can also give rise to enamides, and by this route the mild antibiotic tuberin, and the isomeric (Z)-tuberin have been prepared. A further example of their reactions is illustrated with the acid-catalysed intramolecular cyclisation onto a carbon–carbon double bond. These transformations show that 1-acylamino-1-(trimethylsiloxy)alkanes are versatile precursors to synthetically useful acylimines.
Synthesis and reactions of N,N-bis[1-(trimethylsiloxy)alkyl]-formamides: preparation of (±)-argemonine and (±)-norargemonine
作者:A. Peter Johnson、Richard W. A. Luke、Gurmaj Singh、Andrew N. Boa
DOI:10.1039/p19960000907
日期:——
Symmetrical and unsymmetrical N,N-bis[1-(trimethylsiloxy)alkyl]formamides are prepared and their reactions investigated, including an application to the synthesis of the pavine alkaloids (±)-argemonine and (±)-norargemonine
Die neuen Carbonylaminostyryle der Formel (I)
in welcher
die Substituenten R₁, A, B und Z die in der Beschreibung angegebene Bedeutung haben, eignen sich vorzüglich zur Herstellung druckkopierfähiger, thermoreaktiver oder elektrochromer Aufzeichnungsmaterialien.
式 (I) 的新型羰基氨基苯乙烯
中的
中的取代基 R₁、A、B 和 Z 的含义,非常适合用于生产可打印、热敏或电致变色记录材料。
Brettle, Roger; Mosedale, Alan J., Journal of the Chemical Society. Perkin transactions I, 1988, p. 2185 - 2196