Microwave-promoted tandem reactions for the synthesis of bicyclic γ-lactams
摘要:
A microwave-promoted three-step tandem process for the synthesis of bicyclic gamma-lactams is developed. In all cases examined this led to significantly faster tandem processes producing the bicyclic gamma-lactams more cleanly and reproducibly compared to standard thermal conditions. (C) 2011 Elsevier Ltd. All rights reserved.
Catalyst economy. Part 2: Sequential metathesis—Kharasch sequences using the Grubbs metathesis catalysts
作者:Chris D. Edlin、James Faulkner、Peter Quayle
DOI:10.1016/j.tetlet.2005.12.018
日期:2006.2
Sequential ring-closing metathesis (RCM)–Kharasch cyclizations are promoted by the Grubbs metathesis catalysts and provide rapid access to bicyclic lactones and lactams.
A three-step tandem process for the synthesis of bicyclic γ-lactams
作者:Fiona I. McGonagle、Lindsay Brown、Andrew Cooke、Andrew Sutherland
DOI:10.1039/c004695g
日期:——
A one-pot, three-step tandem process has been developed for the direct synthesis of functionalised bicyclic [3.3.0], [4.3.0] and [5.3.0] γ-lactams from simple allylic trichloroacetimidates. The process involves a palladium(II) mediated Overman rearrangement followed by the use of Grubbs first generation complex which catalyzes both a ring closing metathesis reaction and a Kharasch cyclization. As well
A Tandem Aza-Claisen Rearrangement and Ring Closing Metathesis Reaction for the Synthesis of Cyclic Allylic Trichloroacetamides
作者:Michael D. Swift、Andrew Sutherland
DOI:10.1021/ol702299c
日期:2007.12.1
A one-pot tandem palladium(II)-catalyzed aza-Claisenrearrangement and ring closing metathesis process has been developed for the efficient synthesis of cyclic allylic trichloroacetamides. The use of chiral Pd(II) catalysts such as (S)-COP-Cl during the rearrangement stage results in the preparation of these compounds in excellent yields and in high enantiomeric excess.