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1,3‐Dipolare Additionen an 7‐Methylthieno[2,3‐ c ]pyridin‐1,1‐dioxid
Author(s) -
Fischer Ulf,
Schneider Fernand
Publication year - 1980
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19800630641
Subject(s) - chemistry , diazomethane , yield (engineering) , pyridine , medicinal chemistry , ethyl diazoacetate , stereochemistry , organic chemistry , catalysis , materials science , cyclopropanation , metallurgy
1,3‐Dipolar Additions to 7‐Methylthieno[2,3‐ c ]pyridine 1,1‐dioxide 1,3‐Dipolar additions of diazomethane, diazoethane, ethyl diazoacetate, phenyldiazomethane and phenyl azide to 7‐methylthieno[2,3‐ c ]pyridine 1,1‐dioxide have been examined. The structures of the primary products e.g. 2, 8, 18, 25 have been established and their behaviour towards elevated temperatures and/or basic conditions was investigated. Under these conditions the primary products lost SO 2 or N 2 to yield e.g. 4 , 11 , 19 , 21 , 23 , 27 , 28 .