[5C + 1S] Annulation: A Facile and Efficient Synthetic Route toward Functionalized 2,3-Dihydrothiopyran-4-ones
摘要:
A facile and efficient synthetic route toward highly substituted 2,3-dihydrothiopyran-4-ones 2 has been developed via a formal [5C + 1S] annulation of readily available alpha-alkenoyl ketene-(S,S)-acetals 1 with sodium sulfide nonahydrated salt (Na(2)S(.)9H(2)O) and utilized in the synthesis of 2-(4-chlorophenyl)-6-(morpholin-4-yl)-4H-thiopyran-4-one 51, an inhibitor of DNA-dependent protein kinase (DNA-PK).
[5C + 1S] Annulation: A Facile and Efficient Synthetic Route toward Functionalized 2,3-Dihydrothiopyran-4-ones
摘要:
A facile and efficient synthetic route toward highly substituted 2,3-dihydrothiopyran-4-ones 2 has been developed via a formal [5C + 1S] annulation of readily available alpha-alkenoyl ketene-(S,S)-acetals 1 with sodium sulfide nonahydrated salt (Na(2)S(.)9H(2)O) and utilized in the synthesis of 2-(4-chlorophenyl)-6-(morpholin-4-yl)-4H-thiopyran-4-one 51, an inhibitor of DNA-dependent protein kinase (DNA-PK).
A Practical Route to 2,3-Di-/1,2,3-Trisubstituted Indolizines from<b> α-</b>EWG Ketene <b><i>S</i></b>,<b><i>S</i></b>-Acetals and Their Application in Bis(1-indolizinyl)methane Synthesis
作者:Qun Liu、Shaoguang Sun、Mang Wang*、Hongxia Deng
DOI:10.1055/s-2008-1032144
日期:2008.2
An easy synthesis of 2,3-di-/1,2,3-trisubstituted indo-l-izines has been developed via a formal [3+2] annulation of α-EWG ketene S, S-acetals with 2-pyridine-/2-quinolinecarbaldehyde. The disubstituted products are formed via an intramolecular aza-Michael- addition and subsequent elimination of acetic acid, followed by desulfenylation- assisted by acetic acid, whereas the trisubstituted products are
[5C + 1S] Annulation: A Facile and Efficient Synthetic Route toward Functionalized 2,3-Dihydrothiopyran-4-ones
作者:Xihe Bi、Dewen Dong、Yan Li、Qun Liu、Qian Zhang
DOI:10.1021/jo052032g
日期:2005.12.1
A facile and efficient synthetic route toward highly substituted 2,3-dihydrothiopyran-4-ones 2 has been developed via a formal [5C + 1S] annulation of readily available alpha-alkenoyl ketene-(S,S)-acetals 1 with sodium sulfide nonahydrated salt (Na(2)S(.)9H(2)O) and utilized in the synthesis of 2-(4-chlorophenyl)-6-(morpholin-4-yl)-4H-thiopyran-4-one 51, an inhibitor of DNA-dependent protein kinase (DNA-PK).