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Synthesis of derivatives of 2-imino-5,6-dihydro-2H-thiopyran from 1-heteroalkyl-1,3-butadienes and isothiocyanates

✍ Scribed by Nina A Nedolya; Lambert Brandsma; Hermann D Verkruijsse; Anca H.T.M van der Kerk; Boris A Trofimov


Book ID
104258755
Publisher
Elsevier Science
Year
1998
Tongue
French
Weight
154 KB
Volume
39
Category
Article
ISSN
0040-4039

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✦ Synopsis


A number of derivatives of 2-imino-5,6-dihydi'o-2H-thiopyran have been obtained in fair to good yields by treating the adducts from the a-metallat~dienes H2CffiCH-CH--C(M)X (X ffi OCH 3 tr SCH 3) and isotbioeyanates wi~ a calculated amount of dilute acid.


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Synthesis of Substituted 1,2-Dihydro-2-i
✍ Ivanov, Ivo Christov ;Stoyanov, Edmont Vassilev ;Denkova, Pavletta Stoyanova ;Di πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 470 KB

## Abstract Vilsmeier formylation of the 4‐amino‐2‐pyridinones 4a–d leads to the formation of the corresponding 3‐carbaldehydes 5a–d (the diformylated product 8 is isolated as a by‐product). A cyclizing Knoevenagel reaction of 5 with CH‐acidic nitriles 6 in the presence of piperidine gives substitu