Premium
[2+1] Cycloadditions of Diazoalkanes to Enol Ethers Catalyzed by Chromium Complexes—The First Direct Spectroscopic Observation of a Carbene Complex Intermediate
Author(s) -
Pfeiffer Jürgen,
Dötz Karl Heinz
Publication year - 1997
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199728281
Subject(s) - carbene , chemoselectivity , catalysis , chemistry , chromium , enol , cyclooctene , medicinal chemistry , photochemistry , organic chemistry
A new catalytic route to cyclopropanes from alkenes and diazolakanes is provided by pentacarbonyl(η 2 ‐ cis ‐cyclooctene)chromium(0), which generates the catalyst “Cr(CO) 5 ”. The reactions (1) are characterized by a pronounced chemoselectivity of the participating carbene complex intermediates 1 and allow the unambiguous discrimination of diversely substituted olefins.