o-(p -)nitromethylbenzene

o-(p-) nitromethylbenzene

section o-o o-o

section p-p p-p

P’O P’N

(TMOPP)[P=O(OEt)2]3Co(η5-C5H5)

3-O-p-coumaroyloxyl pentacyclic triterpenoids

88O & 88P]

A O O Process

a-bromo-o-nitroethylbenzene

C6H5CO-O-O-C(CH3)3

CH’IN WANG P’O CHN YEH

CH’ING HAI P’O

CHIH P’O

Doctor Division P． O．Box 910， College Road， Beijing， 100083

Fe P O catalyst

Fe-Al-P-O catalyst

Fe-P-O catalyst

HSIAO P’O CHN YEH

HUANG TI P’O CHN YEH