title: Tandem reaction of propargyl alcohol and N-sulfonylhydrazone: synthesis of dihydropyrazole and its utility in the preparation of 3,3-diarylacrylonitrile.
abstract: An efficient and straightforward strategy for the synthesis of 4-methylene-1-(phenylsulfonyl)-4,5-dihydro-1H-pyrazole from propargyl alcohol and N-sulfonylhydrazone is described. N-Sulfonyl allenamide is postulated to be the key intermediate for this tandem transformation.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, PR. China.
authors.forename: Yuanxun
authors.initials: Y
authors.lastname: Zhu
authors.forename: Shan
authors.initials: S
authors.lastname: Wen
authors.forename: Guangwei
authors.initials: G
authors.lastname: Yin
authors.forename: Deng
authors.initials: D
authors.lastname: Hong
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: Yanguang
authors.initials: Y
authors.lastname: Wang