Nonoxidative photocyclization of A-aryl enamines gives indolinesin good yield. The reaction
provides the first useful synthetic entry to tra/w-hexahydrocarbazoles and is useful for …

Sir: Oxidative photocyclizations of cA-stilbenesto phenanthrenes are well known. 2 Closely
related and note-worthy in the present context are the oxidative cyclizations of …

Several ring-substituted «-(o-tolyl) acetophenones undergo photocyclization to 2-indanol
derivatives in high quantum efficiency in solution and in high chemical yield as solids. The …

Photocyclization of benzo [b] thiophene-2-carboxy-JV-methylanilide yielded l-
benzothiophene [2, 3-c]-trans-14, 15-dihydro-5-methylquinolin-6-one, while the lower …

Three of the title compounds—the hexamethyl-, hexaethyl-, and hexaisopropylbenzils—all
photocyclize both in solution and as solids to 5, 7-dialkyl-2-(2', 4', 6'-trialkylphenyl)-2-hydroxy …

Benzylideneanilines substituted in the ortho position of the aniline ring by hydroxy,
sulfhydryl, or amino groups are photochemically converted tothe corresponding azoles. The …

The photochemistry of several lV-(haloaryl) ethyl 0-enaminones was investigated in order to
develop methods for preparation of tricyclic enaminone systems. The efficiencies of …

The syntheses of 2-aroyl-l-isopropylidene,(Z)-l-ethylidene, and (Z)-l-benzylidene enamides
havebeen accom-plished and their photochemistry studied. Irradiation of the enamides gave …

A series of six alkyl-substituted 3//-pyrazoles has been irradiated with ultraviolet light. In all
cases nitrogen elimination occurs and cyclopropenes are formed in variable yields. Using …

Irradiation of N-α, β-unsaturated acylanilides [(1a–d and 1i) and (2a–f and 2h)] having
various substituents on the benzene ring yielded a mixture of cis-and trans …