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Reaction of trifluoromethanesulfonyl chloride with dialkyl hydroxyalkylmalonates. A synthesis of 2,2,-disubstituted tetrahydrofurans, pyrans and pyrrolidines

✍ Scribed by Gholam Hosein Hamimelai; George Just

Book ID: 104246483
Publisher: Elsevier Science
Year: 1979
Tongue: French
Weight: 187 KB
Volume: 20
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)95486-3

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## Abstract Iodine was explored as an efficient catalyst for the synthesis of tetrahydropyrimidines **4** and pyrrolidines **5** by a multicomponent reaction of dialkyl acetylenedicarboxylates (=dialkyl but‐2‐ynedioates) **1**, amines **2**, and HCHO **3** at room temperature (__Scheme__). When the