Novel intramolecular cycloaddition reactions of arylamino-substituted Fischer chromium carbenes
摘要:
Thermal reaction of N-arylamino-substituted Fischer chromium carbenes having a pendant 2-(1-alkenyl)substituent on the benzene ring affords either substituted indoles or quinolines, depending on starting material, via an intramolecular [2 + 2] cycloaddition forming a metallacyclobutane followed by metathesis to give indoles or beta-elimination to give quinolines.
Synthesis of optically active ene carbamates from chromium carbene complexes: use in palladium(II)-assisted synthesis of relays to (+)-thienamycin
作者:John Montgomery、Gary M. Wieber、Louis S. Hegedus
DOI:10.1021/ja00173a012
日期:1990.8
prepare opticallyactivechromium carbene complexes containing the oxazolidinone moiety led instead to an efficient and general synthesis of opticallyactive ene carbamates. One of these has been subjected to palladium(II)-assisted carboacylation, and complete control of stereochemistry was observed. This compound was converted to a key relay to (+)-thienamycin in good chemical and very high optical yield
尝试制备含有恶唑烷酮部分的光学活性铬卡宾配合物,反而导致了光学活性烯氨基甲酸酯的有效和通用合成。其中之一已进行钯 (II) 辅助的碳酰化,并观察到立体化学的完全控制。该化合物以良好的化学和非常高的光学产率转化为 (+)-硫霉素的关键中继
Synthesis of cyclobutanones by the photolytic reaction of chromium carbene complexes with olefins: inter- and intramolecular reactions
作者:Bjorn C. Soderberg、Louis S. Hegedus、Miguel A. Sierra
DOI:10.1021/ja00167a038
日期:1990.5
MONTGOMERY, JOHN;WIEBER, GARY M.;HEGEDUS, LOUIS S., J. AMER. CHEM. SOC., 112,(1990) N7, C. 6255-6263
作者:MONTGOMERY, JOHN、WIEBER, GARY M.、HEGEDUS, LOUIS S.