The chemistry of alkyl thiosulfinate esters. 9. Antithrombotic organosulfur compounds from garlic: structural, mechanistic, and synthetic studies
作者:Eric. Block、Saleem. Ahmad、James L. Catalfamo、Mahendra K. Jain、Rafael. Apitz-Castro
DOI:10.1021/ja00282a033
日期:1986.10
Synthese de l'ajoene (oxyde-9 de trithia-4,5,9 dodecatriene-1,6,11) et de quelques analogues
合成 de l'ajoene (oxyde-9 de trithia-4,5,9 dodecatriene-1,6,11) et de quelques 类似物
The bioinspired design of a reagent allows the functionalization of C<sub>α</sub>–H of α,β-unsaturated carbonyl compounds via the Baylis–Hillman chemistry under ambient conditions
A rationally designed reagent capable to affect alkylation at C[small alpha] of [small alpha], [small beta]-unsaturated carbonylcompounds is reported. The reaction proceeded at room temperature without any additives. The pH and H-Bond...
Chemistry of sulfines. 12. Unusually facile thio-Claisen rearrangement of 1-alkenyl 2-alkenyl sulfoxides: a new sulfine synthesis
作者:Eric Block、Saleem Ahmad
DOI:10.1021/ja00309a063
日期:1985.11
L'oxydation des allyl vinyl sulfures en leurs sulfoxydes correspondants conduit a une acceleration remarquable de la vitesse de processus sigmatrope [3+3], conduisant a des sulfines isolables pouvant etre converties en les composes carbonyles dans des conditions douces
L'oxydation des allylvinylvinylsulfes en leurs sulfoxydes 通讯员管道 a une 加速 remarquable de la vitesse de processus sigmatrope [3+3], conduisant a des sulfines isolables pouvant etre converties en les composes carbonyles dans des conditions douces
Organocatalytic Enantioselective Aziridination of α-Substituted α,β-Unsaturated Aldehydes: Asymmetric Synthesis of Terminal Aziridines
The first example of a highly enantioselective organocatalytic aziridination of α-substitutedα,β-unsaturatedaldehydes is presented. The reaction is catalyzed by simple chiral amines and gives access to highly functional terminal azirdines containing an α-tertiary amine stereocenter in high yields and enantiomeric ratios (95.5:4.5–98:2).
Catalytic enantioselective construction of all-carbon quaternary stereocenters by an organocatalytic Diels–Alder reaction of α-substituted α,β-unsaturated aldehydes
A binaphthyl-based primary amine (R)- was designed for the Diels-Alderreaction of alpha-substituted alpha,beta-unsaturated aldehydes; in the presence of the TfOH salt of (R)-, the Diels-Alderreaction of alpha-substituted alpha,beta-unsaturated aldehydes with cyclopentadiene proceeded to afford the corresponding cycloadducts having one all-carbon quaternary stereocenter in good yield with good to