Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

Paper | Regular issue | Vol 45, No. 1, 1997, pp.37-44
Published online, 1st January, 1970
DOI: 10.3987/COM-96-7595
■ Reactions of 1-Substituted 2,2-Difluorostyrenes with Dianions of 1,3-Diketones: Novel Synthesis of 4H-Pyran-4-one Derivatives

Bum Tae Kim, No Kyun Park, Chwang Siek Pak, Myong Sang Kim, and In Howa Jeong*

*Pharmaceutical Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusung, Daejeon 305-606, Korea

Abstract

Treatment of 1-substituted 2,2-difluorostyrenes with dianions of 1,3-diketones, which are generated via the reaction of 1,3-diketones with 4 equiv. of LDA in THF at -78 °C, resulted in the formation of 4H-pyran-4-one derivatives in moderated yields by warming to 25 °C.