afford silyl‐substituted bicyclo[5.3.0]decanes, which were highly useful as synthetic intermediates. Stereochemical studies concerning the silylenolether moiety suggested that two types of reaction pathway for the formation of seven‐membered rings were present. The reaction of (Z)‐enolsilylethers proceeded through Cope rearrangement of cis‐divinylcyclopropane intermediates, and that of (E)‐enol silyl
One-pot Synthesis of Chiral <i>cis</i>-Hydrindanes via Diphenylprolinol Silyl Ether Mediated Domino Reaction and Aldol Condensation
作者:Nariyoshi Umekubo、Ryohei Iwata、Yujiro Hayashi
DOI:10.1246/cl.200297
日期:2020.7.5
Substituted chiral hydrindanes were synthesized as single isomers in almost enantiopure forms through a one-pot process that proceeds via the diphenylprolinolsilylether mediated-domino Michael/Mi...
acyclic: The first catalytic, enantioselective, vinylogous Michael reaction of linear, acyclic dienol silyl ethers was achieved. The reaction, based upon the principle of iminium ion catalysis, delivered 1,7‐dioxo compounds in one step with good yields, complete regio‐, and excellent enantioselectivity. γ‐Substituted dienol silyl ethers furnished products with two new stereogenic centers with good diastereoselectivity
A highly enantioselective, organocatalytic [3+2]-cycloannulation reaction towards the de novo-synthesis of 1-cyclopentenyl-α-keto esters
作者:Pradeep R. Nareddy、Christoph Schneider
DOI:10.1039/c5cc05967d
日期:——
A novel [3+2]-cycloannulation process produces cyclopentenes with good yields and excellent enantioselectivity via a domino-vinylogous Michael–Knoevenagel reaction.
Pot and time economies in the total synthesis of Corey lactone
作者:Nariyoshi Umekubo、Yurina Suga、Yujiro Hayashi
DOI:10.1039/c9sc05824a
日期:——
The Corey lactone is a highly versatile intermediate for the synthesis of a variety of prostaglandin hormones that natively control a multitude of important physiological processes. Starting from commercially available compounds, we herein disclose a time-economical, one-pot enantioselective preparation of the Corey lactone by virtue of a new diphenylprolinol silyl ether-mediated domino Michael/Michael