Gold-Catalyzed Three-Component Annulation: Efficient Synthesis of Highly Functionalized Dihydropyrazoles from Alkynes, Hydrazines, and Aldehydes or Ketones

被引：66

作者：

Suzuki, Yamato ^{[1
]}

Naoe, Saori ^{[1
]}

Oishi, Shinya ^{[1
]}

Fujii, Nobutaka ^{[1
]}

Ohno, Hiroaki ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Pharmaceut Sci, Sakyo Ku, Kyoto 6068501, Japan

来源：

ORGANIC LETTERS | 2012年 / 14卷 / 01期

关键词：

ONE-POT; FACILE SYNTHESIS; AMINES; ACCESS; CYCLIZATION; PYRAZOLES; HYDROAMINATION; ADDITIONS; BONDS;

D O I：

10.1021/ol203072u

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Polysubstituted dihydropyrazoles were directly obtained by a gold-catalyzed three-component annulation. This reaction consists of a Mannich-type coupling of alkynes with N,N-disubstituted hydrazines and aldehydes/ketones followed by intramolecular hydroamination. Cascade cyclization using 1,2-dialkynylbenzene derivatives as the alkyne component was also performed producing fused tricyclic dihydropyrazoles in good yields.

引用

页码：326 / 329

页数：4

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