STUDIES ON THE BLUE PIGMENTS PRODUCED FROM GENIPIN AND METHYLAMINE .1. STRUCTURES OF THE BROWNISH-RED PIGMENTS, INTERMEDIATES LEADING TO THE BLUE PIGMENTS

Authors
TOUYAMA R TAKEDA Y INOUE K KAWAMURA I YATSUZUKA M IKUMOTO T SHINGU T YOKOI T INOUYE H
Citation
R. Touyama et al., STUDIES ON THE BLUE PIGMENTS PRODUCED FROM GENIPIN AND METHYLAMINE .1. STRUCTURES OF THE BROWNISH-RED PIGMENTS, INTERMEDIATES LEADING TO THE BLUE PIGMENTS, Chemical and Pharmaceutical Bulletin, 42(3), 1994, pp. 668-673
Citations number
7
Categorie Soggetti
Pharmacology & Pharmacy",Chemistry
Journal title
Chemical and Pharmaceutical Bulletin → ACNP
ISSN journal
00092363
Volume
42
Issue
3
Year of publication
1994
Pages
668 - 673
Database
ISI
SICI code
0009-2363(1994)42:3<668:SOTBPP>2.0.ZU;2-I
Abstract
During the course of studies on the blue pigment formation by the reac tion of genipin with methylamine, nine red to brownish-red intermediar y pigments were obtained under conditions excluding oxygen. They were identified as monomer, dimer, trimer and tetramer of 2-methyl-4-carbom ethoxy-2-pyrindine derivatives on the basis of spectroscopic evidence.