Synthesis of 2(E),4(E)-dienamides and 2(E),4(E)-dienoates from 1,3-dienes via 2-phenylsulfonyl 1,3-dienes
摘要:
A procedure for the preparation of 2E,4E unsaturated carboxylic acid derivatives from dienes was developed. Transformation of terminal 1,3-dienes to (E)-2-phenylsulfonyl 1,3-dienes and subsequent addition of a carboxy anion equivalent and elimination of benzenesulfinic acid led to 2,4-dienoic amides and esters. In this way the natural products N-isobutyl-2(E)4,(E)-undecadienamide (1a), N-isobutyl-2(E),4(E)-decadienamide (pellitorine, 1b), and methyl 2(E),4(E)-decadienoate (1c) were obtained in high isomeric purity.
添加 de Michael de Differents 亲核试剂 sur le phenylsulfonyl-2 cyclohexadiene-1,3、le phenylsulfonyl-3 butadiene-1,3 和 le phenylsulfonyl-2 pentadiene-1,3。Reaction de Diels-Alder entre plusieurs phenylsulfonyl-2 dienes-1,3 和某些 dienophiles comme l'丙烯酸酯 demethyle (les enamines et les ethers d'enol donnent des reactors hautement regioselectives)
Facile cycloaddition of 2-phenylsulfonyl 1,3-dienes to indoles
作者:Jan-E. Bäckvall、Niklas A. Plobeck、Seppo K. Juntunen
DOI:10.1016/s0040-4039(01)80458-5
日期:1989.1
2-Phenylsulfonyl 1,3-dienes react rapidly with the magnesium salt of indoles to give 3-(phenylsulfonyl)-1,4,4a,9a-tetrahydrocarbazoles via a formal [4+2] cycloaddition.
Scope and limitations in the Jacobsen epoxidation of dienyl sulfones
作者:M.F. Hentemann、P.L. Fuchs
DOI:10.1016/s0040-4039(97)01275-6
日期:1997.8
Symchiral (salen)Mn(III)Cl complexes catalyze the epoxidation of 2-sulfonyl, 1,3 cyclic dienes with exceptional enantioselectivity. The incorporation of the sulfone moiety increases the enantioselectivity by up to 30%, relative to the unsubstituted cyclic 1,3-diene.
2-Phenylsulfonyl 1,3-dienes in asymmetric diels-alder reactions with chiral enamines and enol ethers
作者:Jan-E. Bäckvall、Frode Rise
DOI:10.1016/s0040-4039(01)93783-9
日期:1989.1
2-Phenylsulfonyl 1,3-dienes underwent diastereoselective inverse electron demand Diels-Alderreactions with enamines (up to 73% de) and enol ethers (up to 50% de).