4795
J. Org. Chem. 1981,46.4795-4797 9, 78987-12-9; 10, 78987-13-0; o-nitrobenzaldehyde, 552-89-6; 5,15bis(o-nitrophenyl)-2,3,7,8,12,13,17,18-oc~ethylporphyrin,7898714-1; 5-[ 0 - (acetylamino)phenyl]-2,3,7,8,12,13,17,18-octamethyl-
porphyrin, 78987-15-2; 3-mercaptopropionic acid, 107-96-0;2,6-bis(bromomethyl)pyridine, 7703-74-4.
Scheme I
b
