AN IMPROVED PROCEDURE FOR THE PREPARATION OF 2,2'-SPIROBI[2H-1-BENZOPYRAN]

Authors
INBASEKARAN M
Citation
M. Inbasekaran, AN IMPROVED PROCEDURE FOR THE PREPARATION OF 2,2'-SPIROBI[2H-1-BENZOPYRAN], Heterocycles, 35(2), 1993, pp. 1121-1123
Citations number
3
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Heterocycles → ACNP
ISSN journal
03855414
Volume
35
Issue
2
Year of publication
1993
Pages
1121 - 1123
Database
ISI
SICI code
0385-5414(1993)35:2<1121:AIPFTP>2.0.ZU;2-J
Abstract
A simple and improved procedure for preparing multi-gram quantities of 2,2'-spirobi[2H-1-benzopyran] (2) is reported. The cyclization of the dihydroxybenzopyran intermediate (1) into 2 proceeded smoothly when a solution of 1 in 2-ethoxyethyl acetate was heated under reflux for 3 hours.