Synthesis of derivatives of 2-imino-5,6-dihydro-2H-thiopyran from 1-heteroalkyl-1,3-butadienes and isothiocyanates
β 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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β¦ 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.
π SIMILAR VOLUMES
## Abstract Vilsmeier formylation of the 4βaminoβ2βpyridinones 4aβd leads to the formation of the corresponding 3βcarbaldehydes 5aβd (the diformylated product 8 is isolated as a byβproduct). A cyclizing Knoevenagel reaction of 5 with CHβacidic nitriles 6 in the presence of piperidine gives substitu