Samuel G. Levine

PHOTOCHEMISTRY OF 2-ALKYLAMINOPHENOXAZ -3-ONES. II.

Abstract : The photochemistry of 2-dialkylaminophenoxaz-3-ones was investigated. In general these compounds were found to be more photo-reactive than the corresponding monoalkylaminophenoxaz-3-ones. The 2-dimethylaminophenoxaz-3-one underwent photochemical demethylation. Irradiation of the 2-polymethyleneiminophenoxaz-3-ones gave different products depending upon the size of the polymethyleneimine ring. Propyl-, pentyl-, and hexyl-methyleneimine phenoxazones gave novel pentacyclic dicarbomethoxy dimethyl alkyleneoxazolino phenoxazines. Stable dihydrophenoxaz-3-ones were obtained by the reduction of butyl-, pentyl-, and hexyl-methyleneimine phenoxazones.

Diastereoselective synthesis of an (arene)chromium tricarbonyl complex

Synthese facile et peu couteuse dun derive optiquement actif de lo-aminobenzaldehyde et sa conversion en un complexe (arene)-Cr(CO) 3 , par lintermediaire de nitro-2 benzylidene tartrate de dimethyle

Plant antitumour agents: alkaloids: synthesis of a pentacyclic camptothecin precursor

A pentacyclic product (VIII) suitable for conversion into camptothecin (I)2 has been synthesized.