New Stereoselective Syntheses of Stereodefined 2-Substituted Alkyl 2-Alkenoates and Their Applications
作者:Renzo Rossi、Adriano Carpita、Paolo Cossi
DOI:10.1016/s0040-4020(01)89453-9
日期:——
(Z)-4-(tert-butyldimethylsilyloxy)-2-phenyl-2-butenoate, (Z)-9d, has been employed in a very simple and efficient synthesis of 3-phenyl-5(H)-2-furanone, 12, a metabolite of an hypnotic drug. On the other hand, the procedure employed to prepare esters (E)-10, which involves a configurational inversion, has been used to prepare the (S)-enantiomer of (E)-2,4-dimethyl-2-hexenoic acid, (E)-13, a caste-specific
Synthesis of variously 2-substituted alkyl (Z)- and (E)-2-alkenoates and (Z)- and (E)-α-ylidene-γ-butyrolactones via palladium-mediated cross-coupling reactions between organostannanes and organic halides
作者:Fabio Bellina、Adriano Carpita、Massimo De Santis、Renzo Rossi
DOI:10.1016/s0040-4020(01)89314-5
日期:1994.1
2-(1-alkenyl) as well as 2-acyl substituted α,β-unsaturatedesters, is based on the cross-coupling reaction between easily available alkyl (Z)- or (E)-2-halo-2-alkenoates and organostannanes in NMP, in the presence of catalytic amounts of PdCl2(PhCN)2, AsPh3 and CuI. (Z)-and (E)-2-ethenyl substituted α,β-unsaturatedesters prepared according to this procedure have been proven to be useful precursors to (Z)-
New and efficient procedures for the synthesis of stereodefined 2-(hetero)aryl and 2-methyl substituted alkyl 2-alkenoates having very high stereoisomeric purity
作者:Renzo Rossi、Adriano Carpita、Paolo Cossi
DOI:10.1016/s0040-4039(00)60119-3
日期:1992.7
Stereodefined 2-(hetero)aryl and 2-methyl substituted alkyl 2-alkenoates of general formula 1 and 2 have been synthesized with a high degree of stereoselectivity as well as in good overall yields starting from alkyl 2-alkynoates, 4.
Novel Stereoselective Synthesis of (<i>Z</i>)-α,β-Unsaturated Esters by Hydrostannylation-Stille Tandem Reaction of Alkynyl Esters with Aryl Iodides
作者:Jianying Li、Yan Yu、Mingzhu Cheng、Mingzhong Cai
DOI:10.3184/174751911x13192956847054
日期:2011.11
( Z)-α,β-Unsaturated esters can be stereoselectively synthesised in one pot under mild conditions and in good yields, by the hydrostannylation of alkynyl esters followed by Stille cross-coupling with aryl iodides.