功能化的氮杂环丁烷、2,3-二氢呋喃或非正统的二氧杂环己烷-3-氮杂双环酮-4-烯基序是N-环氧乙烷基甲基苯磺酰胺和 β-氯-肉桂醛之间的无过渡金属反应的产物,具体取决于是否使用 NaI /K 2 CO 3或 LiBr/K 2 CO 3。这些扩环反应涉及衍生自N-环氧乙烷基甲基苯磺酰胺和 β-氯肉桂醛作为中间体的烯酰胺(X 射线证据) 。N-环氧乙烷基甲基苯磺酰胺本身在加热时产生易于分离的结晶异构重氮杂环烷,其可通过X-射线晶体学表征。
Twofold Radical-Based Synthesis of <i>N</i>,<i>C</i>-Difunctionalized Bicyclo[1.1.1]pentanes
作者:Helena D. Pickford、Jeremy Nugent、Benjamin Owen、James. J. Mousseau、Russell C. Smith、Edward A. Anderson
DOI:10.1021/jacs.1c04180
日期:2021.7.7
Bicyclo[1.1.1]pentylamines (BCPAs) are of growing importance to the pharmaceutical industry as sp3-rich bioisosteres of anilines and N-tert-butyl groups. Here we report a facile synthesis of 1,3-disubstituted BCPAs using a twofold radical functionalization strategy. Sulfonamidyl radicals, generated through fragmentation of α-iodoaziridines, undergo initial addition to [1.1.1]propellane to afford iodo-BCPAs;
Efficient gold(I)/silver(I)-cocatalyzed cascade intermolecular N-Michael addition/intramolecular hydroalkylation of unactivated alkenes with α-ketones
作者:Ya-Ping Xiao、Xin-Yuan Liu、Chi-Ming Che
DOI:10.3762/bjoc.7.126
日期:——
The gold(I)/silver(I)-cocatalyzed cascade intermolecular N-Michael addition/intramolecular hydroalkylation reaction offers a simple and efficient method for the synthesis of pyrrolidine derivatives in moderate to excellent product yields and with moderate to good diastereoselectivities. The reaction conditions and the substrate scope of this reaction are examined, and a possible mechanism involving