Mitsunobu Reaction of 1,2,3-NH-Triazoles: A Regio- and Stereoselective Approach to Functionalized Triazole Derivatives
作者:Wuming Yan、Tao Liao、Odbadrakh Tuguldur、Cheng Zhong、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1002/asia.201100357
日期:2011.10.4
The Mitsunobureaction was used in the preparation of chiral triazole derivatives. The reactions gave good to excellent yields with large substrate scope. Complete stereochemistry inversion was obtained, making this strategy one practical approach for the synthesis of enantiomeric enriched triazole analogous.
Reactivity of AllylSmBr/HMPA: Facile Synthesis of 3-Aryl-1,2,4-benzotriazines
作者:Ruifeng Yin、Liejin Zhou、Huili Liu、Hui Mao、Xin Lü、Xiaoxia Wang
DOI:10.1002/cjoc.201200989
日期:2013.1
3‐Aryl‐1,2,4‐benzotriazines were conveniently prepared in moderate to good yields from 1,l‐bis(benzotriazol‐1‐yl)methylarenes with allylsamarium bromide/hexamethylphosphramide (allylSmBr/HMPA). Preliminary results indicate that HMPA may enhance the reducing ability as well as prohibit the nucleophicility of allylSmBr, thus making allylSmBr/HMPA as a promising single‐electron transfer (SET) reagent