Three-Component Coupling Reactions of Thioformamides with Organolithium and Grignard Reagents Leading to Formation of Tertiary Amines and a Thiolating Agent
作者:Toshiaki Murai、Fumio Asai
DOI:10.1021/ja068523f
日期:2007.1.1
three-component coupling reaction between thioformamides and organolithium and Grignard reagents was developed. The generality of the process has been demonstrated by using various combinations of reactants and reagents. Information about the mechanism of the reaction has come from 1H and 13CNMR spectroscopic detection of the key intermediate. The LiS group in the intermediates generated by addition
Darstellung und reaktionen von 1,3-bis-trimethylsilyloxy-isobenzofuranen und -isoindolen
作者:T. Troll、G.W. Ollmann
DOI:10.1016/s0040-4039(01)81941-9
日期:1981.1
1,3-Bis-trimethylsilyloxy substituted isobenzofurane (isolated as dimer 3) and isoindoles (isolated as addition products with maleic imide and dibenzoyl ethene) could be prepared by the electrochemical reduction of substituted phthalic anhydrides and phthalic imides in the presence of chlorotrimethylsilane.
Abstract As part of our continuing efforts to discover structurally interesting bioactive phthalide derivatives, 23 of them with a structure incorporating thiophen or halogens were designed and synthesized, 17 of which are previously unreported. In vitro antiplatelet aggregation activity screening showed that 14b could significantly inhibit platelet aggregation induced by arachidonic acid, compared
An indium-catalyzed reaction of lactones and a disilathiane leading to thiolactones is described. The direct synthesis of thiolactones from lactones with an appropriate sulfur source is one of the most attractive approaches in organic and pharmaceutical chemistry. In this context, we found an indium-catalyzed direct conversion of lactones into thiolactones in the presence of elemental sulfur and a
to suitable quinoid model compounds for PITN. Within this context benzylidenedithiophthalide and pentylidenedithiophthalide were chosen as target molecules. The unexpectedrearrangements and the control of these rearrangements in the synthesis of benzylidenedithiophthalide and pentylidenedithiophthalide are reported.
关于通过将市售单体与五硫化二磷(P 4 S 10)反应,一步合成聚(异硫杂萘)(PITN)的反应的机理研究,就产生了一种合成链终止分子的想法,该链终止分子应产生适用于PITN的醌型模型化合物。在这种情况下,选择苄基二硫代邻苯二甲酰和戊二烯二硫代邻苯二甲酸酯作为靶分子。报道了苄二烯二噻吩和戊二烯二噻吩的合成中意想不到的重排和这些重排的控制。