The Journal Of Organic Chemistry

Preparation of Bicyclo [3.3. 0] oct-1-en-3-one and Bicyclo [4.3. 0] non-1 (9)-en-8-one via Intramolecular Cyclization of. Alpha.,. Omega.-Enynes

NE Schore, MC Croudace

Index: Schore, N. E.; Croudace, M. C. Journal of Organic Chemistry, 1981 , vol. 46, # 26 p. 5436 - 5438

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Citation Number: 123

Abstract

Experimental Section Trimethylpentane (Phillips) was dried over 4A molecular sieves before use. Dimethyl sulfoxide (Mallinkrodt) was distilled from calcium hydride at reduced pressure and stored over 4A molecular sieves. Lithium acetylide-ethylenediamine complex (Alfa), 5- chloro-1-pentene (ICN), 6-chloro-1-hexene (ICN), and Girard reagent" T"(Fisher) were obtained commercially and used as received.