Methyl -3-phenylsulfonyl-2-propenoate

METHYL (Z)-3-(BENZENESULFONYL)PROP-2-ENOATE (2-Propenoic acid, 3-(phenylsulfonyl)-, methyl ester, (Z)-)... 

Propenoic acid, 2-(bromomethyl)-, ethyl ester (17435-72-2), 66, 224 2-Propenoic acid, 2-(hydroxymethyl)-, ethyl ester (10029-04-6), 66, 224 2-Propenoic acid, 3-phenyl-, methyl ester (103-26-4), 68,155 2-PROPENOIC ACID, 3-(PHENYLSULFONYL)-, METHYL ESTER, (Z) (91077-67-7), 69, 169... 

It is well established that 3-alkyl pyridines are selectively reduced at N1-C2, to produce 3-alkyl-l,2-DHPs [58,59,60], 5-Alkyl-l,2-DHPs, which result from hydride addition at C-6, are potentially valuable synthetic intermediates [61]. Substituent effects on the regiochemistry of the reduction of A-carbalkoxypyridinium salts have been studied in detail by Sundberg [62]. These DHPs have served as useful dienes for the synthesis of ISQs. Methyl 2-[l-phenylsulfonyl-lH-indol-2-yl]-2-propenoate (62) served as dienophile in most of these reactions [61,62,63,64,65,66,67,68]. Palladium-catalyzed radical cyclization [63], photocyclization [64] or thermal cyclization [61,65,66,67,68] reactions have all been employed to furnish the Diels-Alder adducts (e.g., 63). 

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