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: ¥ 4,320 (Yen only)
Period: This Article can be accessed for 7 days.

Short Paper | Regular issue | Vol 85, No. 12, 2012, pp.3007-3013
Published online, 30th October, 2012
DOI: 10.3987/COM-12-12584
One-Pot Synthesis of 2-(1,4-Dihydro-2H-3,1-benzothiazin-2-ylidene)propanedioic Acid Derivatives by the Reaction of 2-(1-Bromoalkyl)phenyl Isothiocyanates with Propanedioic Acid Derivatives Using Sodium Hydride

Kazuhiro Kobayashi* and Kosuke Ezaki

*Division of Applied Chemistry, Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan

Abstract

An efficient one-pot procedure for the preparation of 2-(1,4-dihydro-2H-3,1-benzothiazin-2-ylidene)propanedioic acid derivatives from 2-(1-bromoalkyl)phenyl isothiocyanates with propanedioic (malonic) acid derivatives, such as propanedinitrile, ethyl cyanoacetates, 3-oxo-3-(pyrrolidin-1- yl)propanenitrile and diethyl propanedioate, has been developed. The reactions are carried out in the presence of two equivalents of sodium hydride at –20 ˚C to give the desired products.