Photochemistry of Thiophen-2(5H)-ones
✍ Scribed by René Kiesewetter; Paul Margaretha
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- German
- Weight
- 476 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0018-019X
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📜 SIMILAR VOLUMES
## Abstract magnified image Reactions of 3‐chlorobenzo[__b__]thiophene‐2‐carbonyl chloride with 2‐alkyl‐2‐aminopropanamides have been used to prepare a series of carboxamides **1a‐d** (yields 61‐85%). The products were submitted to base‐catalysed ring closure reactions to give the corresponding 4,
In two steps, 5,Sdimethyl-lH-pyrrol-2(5H)-one (3a) was prepared from 5,5-dimethylpyrrolidine-2,4-dione ( = dimethyltetramic acid; 4) in 71 % overall yield (Scheme 1 ) and further converted to N-substituted derivatives 3b-f viu acylation, alkylation, or methoxycarbonylation of its anion (Scheme 2). T
## Abstract Irradiation (λ = 350 nm) of 1__H__‐[2]benzothiopyran‐1‐one (2) in the solid state affords selectively and in good yield 6aα, 6bα, 12bα, 12cα ‐tetrahydrocyclobuta[1, 2‐__c__:4, 3‐__c__′]bis([2]benzothiopyran)‐5, 8‐dione (3), the head‐to‐head (HH) __cis__‐__cisoid__‐__cis__‐cyclodimer of