Transposition oxy-cope assistee par le trifluoroacetate mercurique en quantite stoechiometrique et en quantite catalytique
作者:Norbert Bluthe、Max Malacria、Jacques Gore
DOI:10.1016/0040-4020(84)85011-5
日期:1984.1
Tertiary 1,5-hexadien-3-ols are transformed at room temperature into δ-ethylenic ketones in 35-90%, yields under two sets of conditions: treatment with one molar equivalent of mercuric trifluoroacetate followed by demercuration of the intermediate α-mercuro ketone with sodium borohydride; and treatment with 0.2 molar equivalent of t of lithium trifluoroacetate or trifluorométhansulfonate. The reactions
Allylcerium(III) compounds, powerful new synthetic reagents. A new stereocontrolled approach to olefins and methylene-interrupted polyenes
作者:Bao Shan Guo、Wendel Doubleday、Theodore Cohen
DOI:10.1021/ja00249a038
日期:1987.7
Synthese en particulier d'octadiene-1,5ol-3 et undecatriene-1,5,8ol-3 a partir de la reaction de sulfures allyliques avec des enaldehydes ou enones en presence d'allyl-cerium
合成这些 en particulier d'octadiene-1,5ol-3 和 undecatriene-1,5,8ol-3 a partir de la reaction desulfes allyliques avec des enaldehydes ou enones en存在 d'allyl-cerium
<i>O-</i>Acetyl 1,3-Propanediol as an Acrolein Proelectrophile in Enantioselective Iridium-Catalyzed Carbonyl Allylation
作者:Katherine L. Verboom、Cole C. Meyer、Madeline M. Evarts、Woo-Ok Jung、Michael J. Krische
DOI:10.1021/acs.orglett.3c01022
日期:2023.5.26
O-Acetyl 1,3-propanediol serves as an acrolein proelectrophile in π-allyliridium-C,O-benzoate-catalyzed carbonyl allylationsmediated by racemic α-substituted allylic acetates. Using the iridium catalyst modified by (R)-SEGPHOS, a variety of 3-hydroxy-1,5-hexadienes are formed with uniformly high levels of regio-, anti-diastereo-, and enantioselectivity.
Allyl Alcohol as an Acrolein Equivalent in Enantioselective C–C Coupling: Total Synthesis of Amphidinolides R, J, and S
作者:Cole C. Meyer、Katherine L. Verboom、Madeline M. Evarts、Woo-Ok Jung、Michael J. Krische
DOI:10.1021/jacs.3c01809
日期:——
The first systematic study of catalytic enantioselective 1,2-additions to acrolein is described. Specifically, using allyl alcohol as a tractable, inexpensive acrolein proelectrophile, iridium-catalyzed acrolein allylation is achieved with high levels of regio-, anti-diastereo-, and enantioselectivity. This process delivers 3-hydroxy-1,5-hexadienes, a useful compound class that is otherwise challenging
描述了丙烯醛催化对映选择性 1,2-加成的首次系统研究。具体而言,使用烯丙醇作为易于处理的、廉价的丙烯醛亲电子试剂,实现了铱催化的丙烯醛烯丙基化,具有高水平的区域选择性、反非对映选择性和对映选择性。该过程产生 3-羟基-1,5-己二烯,这是一种有用的化合物类别,否则很难通过对映选择性催化获得。该方法的两次使用解锁了两栖内酯 R(9 vs 23 步骤,LLS)和两栖内酯 J(9 vs 23 或 26 步骤,LLS)的简明全合成,其制备步骤少于以前可能的一半,并且首次全合成 amphidinolide S(10 步,LLS)。
Vapor-phase thermolyses of 3-hydroxy-1,5-hexadienes. II. Effects of methyl substitution
作者:Alfred. Viola、E. James. Iorio、Katherine K. N. Chen、George M. Glover、Ullhas. Nayak、Philip J. Kocienski