A new preparation of cis-N-sulfonylaziridines from N-sulfonylaldimines using trimethylsilyldiazomethane
作者:Rina Hori、Toyohiko Aoyama、Takayuki Shioiri*
DOI:10.1016/s0040-4039(00)01601-4
日期:2000.12
Trimethylsilyldiazomethane smoothly reacts with N-sulfonylaldimines to give 2-substituted N-sulfonyl-3-trimethylsilylaziridines in good yields with high cis selectivity.
The carboxyl group (COOH) is an omnipresent functional group in organic molecules, and its direct catalytic activation represents an attractive synthetic method. Herein, we describe the first example of a direct catalytic nucleophilic activation of carboxylicacids with BH3·SMe2, after which the acids are able to act as carbon nucleophiles, i.e. enolates, in Mannich-type reactions. This reaction proceeds
Iron-Catalyzed Contrasteric Functionalization of Allenic C(sp<sup>2</sup>)–H Bonds: Synthesis of α-Aminoalkyl 1,1-Disubstituted Allenes
作者:Yidong Wang、Sarah G. Scrivener、Xiao-Dong Zuo、Ruihan Wang、Philip N. Palermo、Ethan Murphy、Austin C. Durham、Yi-Ming Wang
DOI:10.1021/jacs.1c07512
日期:2021.9.22
An iron-catalyzed C–H functionalization of simple monosubstituted allenes is reported. An efficient protocol for this process was made possible by the use of a newly developed electron-rich and sterically hindered cationic cyclopentadienyliron dicarbonyl complex as the catalyst and N-sulfonyl hemiaminal ether reagents as precursors to iminium ion electrophiles. Under optimized conditions, the use of