122170-98-3Relevant academic research and scientific papers
Isolation of Four 2,3,5,6,11,11b-Hexahydro-3-oxo-1H-indolizinoindole-5-carboxylic Acids from Clerodendron Trichotomum Thunb and Properties of Their Derivatives
Irikawa, Hajime,Toyoda, Yasuhiro,Kumagai, Hiroaki,Okumura, Yasuaki
, p. 880 - 887 (2007/10/02)
Four 2,3,5,6,11,11b-hexahydro-3-oxo-1H-indolizinoindole-5-carboxylic acids, plausible precursors of trichotomine, were isolated as the methyl esters from Clerodendron trichotomum Thunb, and the structures elucidated on the basis of their spectral a
SYNTHESIS AND EPIMERIZATION OF 11b-SUBSTITUTED-INDOLIZINOINDOLE-5-CARBOXYLIC ACID METHYL ESTERS
Irikawa, Hajime,Okumura, Yasuaki
, p. 1055 - 1058 (2007/10/02)
The methoxide-catalyzed epimerization at C-5 of the 11b-substituted-indolizinoindole-5-carboxylic acid methyl esters was in line with the stereochemical relationship of the substituent on C-11b and the methoxycarbonyl group on C-5.
