Domino Synthesis of α,β‐Unsaturated γ‐Lactams by Stereoselective Amination of α‐Tertiary Allylic Alcohols
作者:Jianing Xie、Sijing Xue、Eduardo C. Escudero‐Adán、Arjan W. Kleij
DOI:10.1002/anie.201810160
日期:2018.12.17
alcohols equipped with a carboxyl group can be smoothly aminated under ambient conditions by a conceptually new and stereoselective protocol under palladium catalysis. The in situ formed Z‐configured γ‐amino acid cyclizes to afford an α,β‐unsaturated γ‐lactam, releasing water as the only byproduct. This practical catalytic transformation highlights the use of a carboxyl group acting as an activating
A photoredox 1,1-dichloromethylation of alkenes with the readily available bulk chemical chloroform was described, furnishing a variety of 1,1-dichloroalkane products selectively. Furthermore, this transformation could proceed smoothly on gram-scale, and the obtained products could transform into diverse γ-lactam derivatives with simple treatment. Mechanistically, the single electron transfer (SET)
One-pot synthesis of α,β-unsaturated butyralactams from allyl amines
作者:José Barluenga、Francisco J. Fañanás、Francisco Foubelo、Miguel Yus
DOI:10.1016/s0040-4039(00)80627-9
日期:1988.1
The successive reaction of different allylamines with -butyl -lithium, -butyl-lithium, and diethylcarbonate at temperatures ranging between -50 and 20°C leads after hydrolysis to the corresponding α,β-unsaturated butyrolactams in an one-pot process.
Formal 1,6-insertion of an alkylidenecarbene into a carbon-hydrogen bond. Unveiling of a stepwise reaction mechanism.
作者:John C. Gilbert、Brent K. Blackburn
DOI:10.1016/s0040-4039(00)97717-7
日期:1990.1
The formation of 1,3-dimethylquinol-2-one (6a) by reaction of N-methyl-N-phenyl-2-oxopropanamide (1a) with diethyl (diazomethyl)phosphonate (2), an apparent CH insertion by an alkylidenecarbene, is shown to involve a stepwise rather than a concerted reaction pathway.