o-Iodoxybenzoic Acid- and Tetraethylammonium Bromide-Mediated Oxidative Transformation of Primary Carboxamides to One-Carbon Dehomologated Nitriles
摘要:
A clean and efficient method for the oxidative transformations of primary carboxamides to one-carbon dehomologated nitriles using the combination of o-iodoxybenzoic acid and tetraethylammonium bromide has been developed. This method exhibits a broad scope and is expected to be of great utility in organic synthesis.
reaction of substituted phenylketenes with diethylamine in acetonitrile were suggested to be the amideenols rather than the zwitterions on the basis of the theoretical calculations. A single broad band at 1674 cm−1 observed for reaction with the primary amines was attributed to overlap of two bands of the intermediate (amideenol) and the final product (amide). The substituenteffect for the second‐order
Palladium-Catalyzed CS Activation/Aryne Insertion/Coupling Sequence: Synthesis of Functionalized 2-Quinolinones
作者:Ying Dong、Bangyu Liu、Peng Chen、Qun Liu、Mang Wang
DOI:10.1002/anie.201310340
日期:2014.3.24
The insertion of an aryne into a CS bond can suppress the addition of an S nucleophile to the aryne in the presence of palladium. Catalyzed by Pd(OAc)2, a wide range of α‐carbamoyl ketene dithioacetals readily react with arynes to selectively afford functionalized 2‐quinolinones in high yields under neutral reaction conditions by a CSactivation/aryneinsertion/intramolecular couplingsequence. The
An efficient method for one-carbon elongation of aryl aldehydes via their dibromoalkene derivatives
作者:Dal Ho Huh、Ji Sang Jeong、Hee Bong Lee、Hoejin Ryu、Young Gyu Kim
DOI:10.1016/s0040-4020(02)01324-8
日期:2002.12
Various aryl aldehydes were efficiently converted into one-carbon extended aryl acetamides or aryl acetic acids through the reaction of their dibromoalkene derivatives with pyrrolidine in the presence of water under very mild conditions.