A Weinreb amide approach to the synthesis of trifluoromethylketones
作者:DiAndra M. Rudzinski、Christopher B. Kelly、Nicholas E. Leadbeater
DOI:10.1039/c2cc35037h
日期:——
A novel route to access trifluoromethylketones (TFMKs) from Weinreb amides is reported. This represents the first documented case of the Ruppert–Prakash reagent (TMS–CF3) reacting in a constructive manner with an amide and enables synthesis of TMFKs without risk of over-trifluoromethylation.
straightforward synthesis of acylating reagents such as Weinreb and MAP amides fromaromatic, aliphatic carboxylic acids, and amino acids using PPh3/NBS combination is described. A chemo-selective modification of the carboxylic acid group into Weinreb amide in the presence of more reactive aldehydes and ketones is presented. All reactions were performed at ambient temperature under air using undried commercial
Rhodium-Catalyzed CH Olefination of Aryl Weinreb Amides
作者:Yan Wang、Chao Li、Yan Li、Feng Yin、Xi-Sheng Wang
DOI:10.1002/adsc.201300174
日期:2013.6.17
A rhodium(III)‐catalyzed oxidative CHolefination directed by Weinrebamides, a class of well developed versatile building blocks in organic synthesis, has been developed with air as the terminal oxidant. The reactions proceed with excellent reactivity, good functional group tolerance and high yields.
Mo(CO)6 as a Solid CO Source in the Synthesis of Aryl/Heteroaryl Weinreb Amides under Microwave-Enhanced Condition
作者:Raghu Ningegowda、Savitha Bhaskaran、Ayyiliath M. Sajith、Chandrashekar Aswathanarayanappa、M. Syed Ali Padusha、Nanjunda Swamy Shivananju、Babu Shubha Priya
DOI:10.1071/ch16213
日期:——
The facile transformation of aryl/heteroaryl nonaflates into corresponding amides via Pd-catalyzed aminocarbonylation using Mo(CO)6 as a solid CO source under microwave-enhanced condition is reported. The method was found to be tolerant with respect to a diverse range of electronically biased aryl/heteroaryl nonaflates, and exceptional yields were obtained. The optimized protocol was further extended