Process for the preparation of ketoalkynoic acids and use of the process
申请人:Miles Laboratories, Inc.
公开号:US04026911A1
公开(公告)日:1977-05-31
Reaction of a 2-methyl-2-(alkenyl)-1,3-dioxolane with an .alpha.,.omega.-dihalogenoalkane to obtain a 2-methyl-2-(.omega.-chloroalkynyl)-dioxolane, conversion of the latter to a corresponding nitrile, and hydrolysis of the nitrile to form a ketoalkynoic acid is a novel process for preparing the acid. Use of the process in the synthesis of 2-(substituted)-cyclopentane-1,3,4-triones improves that synthesis.
Total synthesis of prostaglandins. V. A synthesis of (−)-prostaglandin E2 a totally asymmetric process.
作者:J.B. Heather、Rattan Sood、Philip Price、George P. Peruzzotti、Sang.S. Lee、Hsu Lee Lan-Fong、Charles J. Sih
DOI:10.1016/s0040-4039(01)87625-5
日期:1973.1
US4026911A
申请人:——
公开号:US4026911A
公开(公告)日:1977-05-31
Total synthesis of prostaglandins. VII. Symmetric total synthesis of (-)-prostaglandin E1 and (-)-prostaglandin E2
作者:Charles J. Sih、J. B. Heather、Rattan Sood、Philip Price、George Peruzzotti、L. F. Hsu Lee、S. S. Lee
DOI:10.1021/ja00837a029
日期:1975.2
Catalytic and Highly Efficient 1,4-Addition of Terminal Alkynes to Conjugated Enones by [RuCl<sub>2</sub>(<i>p</i>-cymene)]<sub>2</sub>/Pyrrolidine
作者:Sukbok Chang、Youngim Na、Eunjung Choi、Sunggak Kim
DOI:10.1021/ol016047m
日期:2001.6.1
[reaction: see text] A wide range of terminalalkynes was added to conjugated enones in a 1,4-fashion by a ruthenium catalyst in the presence of catalytic amounts of an amine base, and the corresponding gamma,delta-alkynyl ketones were obtained in good to excellent yields.