The Asymmetric Diels–Alder Cycloaddition Using Ethyl (−)-(<i>Z</i>)-(<i>R</i>)<sub>S</sub>-2-Methyl-3-(<i>p</i>-tolylsulfinyl)propenoate: Application to an Enantioselective Synthesis of (+)-<i>epi</i>-β-Santalene
The Diels–Alder reaction of ethyl (−)-(Z)-(R)S-2-methyl-3-(p-tolylsulfinyl)propenoate (6) with cyclopentadiene gave the cycloadducts 7, 8, and 9 in a high diastereoselective manner. The cycloadduct 7 was transformed into the acetal (−)-25. The racemic 25 was used as an intermediate in the synthesis of (±)-β-santalol. Thus, the chiral acetal (−)-25 should provide a route to (−)-β-santalol. The cycloadduct
The present invention provides an isothiocyanate compound and its application. The compound is an aryl-substituted isothiocyanate compound that has a structure of the general formula I. The isothiocyanate compound of the present invention has very good solubility in water, far better inhibitory activity for XPO1 protein than other non-aryl substituted congeneric compounds, little side effects, and good biological safety and bioavailability, and is quite suitable for clinical application. Therefore, the isothiocyanate compound would have tremendous potential market space and economic benefits.
Synthesis of 1-p-tolylsulfinyl-1,3-dienes by intramolecular Heck reactions
作者:M Mar Segorbe、Javier Adrio、Juan C Carretero
DOI:10.1016/s0040-4039(00)00079-4
日期:2000.3
The first examples of the synthesis of 1,3-dienyl sulfoxides by Heckreactions are described. Both racemic and enantiomerically pure exocyclic 1-p-tolylsulfinyl-1,3-dienes 1 are readily prepared by the intramolecularHeckreaction of their corresponding vinyl iodides in the presence of Pd(OAc)2 as catalyst and Ag2CO3 as base.
描述了通过Heck反应合成1,3-二烯基亚砜的第一个实例。通过在Pd(OAc)2作为催化剂和Ag 2 CO 3作为碱的存在下,通过其相应的乙烯基碘的分子内Heck反应,可以容易地制备外消旋和对映体纯的环外1-对甲苯亚磺酰基-1,3-二烯1。