- Palladium-Catalyzed C-S Bond Cleavage with Allenoates: Synthesis of Tetrasubstituted 2-Alkenylfuran Derivatives
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Palladium-catalyzed C-S cleavage of tetrasubstituted internal alkene α-oxo ketene dithioacetals was realized with allenoates as the coupling partners, efficiently affording tetrasubstituted 2-alkenylfuran derivatives with excellent regioselectivity under mild conditions. Allenoates acted as C1 synthons in the desulfurative [4 + 1] annulation.
- Wang, Quannan,Liu, Zhuqing,Lou, Jiang,Yu, Zhengkun
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supporting information
p. 6007 - 6011
(2018/10/09)
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- Tin tetrachloride-catalyzed regiospecific allylic substitution of quinone monoketals: An easy entry to benzofurans and coumestans
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A highly regioselective allylic substitution of quinone monoketals with a-oxoketene dithioacetals is achieved under the catalysis of only tin tetrachloride (1 mol%). The advantages of the reaction, including its simplicity, rapidity, low catalyst loading of inexpensive tin tetrachloride, mild conditions and; in particular, the regiospecificity, is proposed to be due to a pseudo-intramolecular process. This new synthetic method provides a facile [3+2] cycloaddition route to benzofurans and is highlighted by the synthesis of coumestans.
- Liu, Yingjie,Liu, Jingxin,Wang, Mang,Liu, Jun,Liu, Qun
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supporting information
p. 2678 - 2682
(2013/01/15)
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- A convenient synthesis of 2,3,4,5-functionalised thieno[2,3-b]thiophenes
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A two steps simple synthesis of 2,3,4,5-functionalised thieno[2,3-b]thiophenes 2-6 from ketene dimethylthioacetals is described.
- Sommen, Geoffroy,Comel, Alain,Kirsch, Gilbert
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p. 735 - 741
(2007/10/03)
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- Application of commercially available anhydrous potassium fluoride for a convenient synthesis of ketene dithioacetals
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Commercially available anhydrous KF without activation or solid support promotes condensation between active methylene compounds, carbon disulfide and an alkylating agent in dry DMF to allow the preparation of a variety of ketene dithioacetals in fair to good yields under ambient conditions.
- Mashraqui, Sabir H.,Hariharasubrahmanian, Harini
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p. 492 - 493
(2007/10/03)
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- A convenient one-pot synthesis of ketene dithioacetals
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An easy synthesis of ketene dithioacetals 2 and 3 by the condensation of carbon disulfide and active methylene compounds 1 with subsequent alkylation in the presence of potassium fluoride is described.
- Villemin,Alloum
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p. 301 - 303
(2007/10/02)
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