## Abstract Irradiation of the quinoid α‐aryl‐substituted γ‐oxo‐α,β‐unsaturated carboxylic esters **7a‐b** and amides **10a‐b**, derived from 9,10‐phenanthrenequinone, afforded, in addition to the __Z/E__ isomers, the 8‐oxo‐8H‐benzo[__f,g__]naphthacene‐9‐carboxylic esters **(13a‐b)** and amides (**
Photoisomerization of a α-aryl-γ-oxo-α,β-unsaturated carboxamide. Ring enlargement to a cycloheptatriene derivative.
✍ Scribed by W. Verboom; H.J.T. Bos
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 117 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
As a part of our investigations of photochemical cycloadditiorswith acetylenes we reported the formation of y-lactones 2 by irradiation esters A, R'=Alkyl, R2=Ph of Me.
📜 SIMILAR VOLUMES
γ-Oxo-α,β-unsaturated δ-lactones and lactams, which are in high yields, of the corresponding α-amino-γ-oxo-α,βunsaturated δ-lactones and -lactams, compounds of great easily accessible from their corresponding 2-furylcarbinols, were used as substrates for the 1,4-reductive addition of biological and
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