二甲基-2-(甲苯磺酰基甲基)富马酸酯(6),由衣康酸二甲酯iodosulfonylation-脱碘化氢制备,carbonucleophiles或甲醇钠的反应允许3-取代的衣康酸酯衍生物的直接合成8经由A S Ñ 2'通路。当硫醇钠被用作亲核试剂2-(烷基硫代)富马酸酯9个或alkylthiomethylene丁酸酯10经由双S得到Ñ 2'处理过程。在吡咯烷和环戊酮烯胺的情况下,分别获得相应的二氨基衍生物11和双环[3.2.1]酮12。
Facile Chemo-, Regio-, and Diastereoselective Approach to <i>cis</i>-3,5-Disubstituted γ-Butyrolactones and Fused γ-Butyrolactones
作者:Md. Merajuddin Baag、Vedavati G. Puranik、Narshinha P. Argade
DOI:10.1021/jo0619128
日期:2007.2.1
Chemoselective SN2‘ condensation of primary enolates of alkyl methyl ketones 2a−e with dimethyl bromomethylfumarate (1) followed by highly diastereoselective NaBH4 reduction of the ketone function in the formed ketodiesters 3a−e and the regioselective in situ lactonization of the unisolable intermediates 4a−e exclusively furnished the cis-3,5-disubstituted γ-butyrolactones (±)-5a−e in very good yields
Dimethyl 2-(tosylmethyl)fumarate: An allyl sulfone as electrophilic reagent for the synthesis of itaconate ester derivatives
作者:Rafael Chinchilla、Nuria Galindo、Carmen Nájera
DOI:10.1016/0040-4020(95)00937-x
日期:1996.1
The reaction of dimethyl 2-(tosylmethyl)fumarate (6), prepared by iodosulfonylation-dehydroiodination of dimethyl itaconate, with carbonucleophiles or sodium methoxide allows the direct synthesis of 3-substituted itaconate ester derivatives 8 via a SN2′ pathway. When sodium thiolates are used as nucleophiles dimethyl 2-(alkylthiomethyl)fumarates 9 or alkylthiomethylene butanoates 10 are obtained via
二甲基-2-(甲苯磺酰基甲基)富马酸酯(6),由衣康酸二甲酯iodosulfonylation-脱碘化氢制备,carbonucleophiles或甲醇钠的反应允许3-取代的衣康酸酯衍生物的直接合成8经由A S Ñ 2'通路。当硫醇钠被用作亲核试剂2-(烷基硫代)富马酸酯9个或alkylthiomethylene丁酸酯10经由双S得到Ñ 2'处理过程。在吡咯烷和环戊酮烯胺的情况下,分别获得相应的二氨基衍生物11和双环[3.2.1]酮12。