Copper(II)–acid catalyzed cyclopropanation of 1,3-dienamides by electrophilic activation of α-aryl diazoesters
摘要:
Copper(II)-acid catalyzed cyclopropanation of electron-rich alkenes, such as 1,3-dienamides, with cc-aryl diazoesters are described. The reaction could be performed without rare metal catalysts, excess substrate, or the need for the slow addition of the diazoesters. (C) 2014 Elsevier Ltd. All rights reserved.
Stereoselective preparation of (1Z)- and (1E)-N-Boc-1-amino-1,3-dienes by stereospecific base-promoted 1,4-elimination
作者:Eiji Tayama、Yuka Toma
DOI:10.1016/j.tet.2014.12.039
日期:2015.1
The base-promoted 1,4-elimination reaction of N-Boc-1-amino-4-methoxy-2-alkene 1 is shown to proceed with perfect stereoselectivity to afford the corresponding N-Boc-1-amino-1,3-diene 2 in good yields. The reaction is highly stereospecific. The substrate E-1 gave 1Z-2 by the 'Syn-Effect' and Z-1 gave 1E-2 via formation of a chelated intermediate. Our method is widely applicable to the preparation of various types of N-Boc-1-amino-1,3-dienes 2. (C) 2014 Elsevier Ltd. All rights reserved.
Hurd; Fowler, Journal of the American Chemical Society, 1939, vol. 61, p. 251
作者:Hurd、Fowler
DOI:——
日期:——
Boron trifluoride promoted reaction of alkyl hypohalites with alkenes. A new synthesis of fluoro halides
作者:Victor L. Heasley、Robert K. Gipe、Jody L. Martin、Harry C. Wiese、Melanie L. Oakes、Dale F. Shellhamer、Gene E. Heasley、Brian L. Robinson
DOI:10.1021/jo00167a011
日期:1983.9
Braun,H. et al., Justus Liebigs Annalen der Chemie, 1973, p. 1317 - 1328