Organometallic Chemistry sans Organometallic Reagents: Modulated Electron‐Transfer Reactions of Subvalent Early Transition Metal Salts
作者:John J. Eisch、Xian Shi、Joseph R. Alila、Sven Thiele
DOI:10.1002/cber.19971300903
日期:1997.9
reductant, titanium dichloride, has been throughly examined, as well as the analogous ZrCl2 and HfCl2 reagents, all of which are readily obtainable by the alkylative reduction of the Group tetrachloride by butyllithium in THF. Noteworthy is that such interactions of MCl4 with butyllithium in hydrocarbon media lead, in contrast, to M(III) or M(IV) halide hydrides. Analogous alkylative reductions in THF
[EN] HETROARYLAMINE COMPOUNDS FOR MODULATING THE HEDGEHOG PATHWAY AND PREPARING METHOD AND USES THEREOF<br/>[FR] COMPOSÉS D'HÉTÉROARYLAMINE POUR MODULER LA VOIE HEDGEHOG ET PROCÉDÉ DE PRÉPARATION ET UTILISATIONS DE CEUX-CI
申请人:DEV CT BIOTECHNOLOGY
公开号:WO2018098250A1
公开(公告)日:2018-05-31
The present invention provides a compound of formula (I) wherein X, Y, Z1, Z2, R1, R2, A, B, p and q are as disclosed in the specification. A pharmaceutical composition and a method for modulating the Hedgehog pathway are also provided. The present invention further provides a process for preparing the compound.
Astonishing Alkylation and Unusual Reduction Reactions of Anionic Titanium(II) Isopropoxide Complexes: Evidence for SET Processes in Transition-Metal Oxidative Additions
mixture of titanium(II) isopropoxide and lithium isopropoxide (1:2), generated in THF by the treatment of titanium(IV) isopropoxide with two equivalents of n-butyllithium, has been shown to be an unexpected alkylating agent as well as an unusualreducingagent for a wide variety of organic substrates. Since titanium(II) isopropoxide, which is free of any lithium isopropoxide, neither causes alkylation
异丙醇钛 (II) 和异丙醇锂 (1:2) 的混合物,通过用两当量的正丁基锂处理异丙醇钛 (IV) 在 THF 中生成,已被证明是一种意想不到的烷化剂以及适用于各种有机底物的不寻常还原剂。由于不含任何异丙醇锂的异丙醇钛 (II) 既不会引起任何相同底物的烷基化,也不是如此强大的还原剂,因此建议异丙醇锂通过以下方式激活异丙醇钛 (II) 以进行此类不寻常的反应形成锂盐配位络合物 Li2Ti[OiPr]4。前所未有的烷基化反应的例子是水解后,各种取代的苯甲腈转化为异丙基取代的苯基酮,(二氯甲基)苯转化为,主要是 2-甲基-1-苯基-1-丙烯和(三氯甲基)苯转化为异丙基苯基酮。通过分别比较 Li2Ti[OiPr]4 和 Ti[OiPr]2 的还原作用,已经表明,通常,锂盐是环氧化物、苄基卤化物和共轭烯烃的更强大的还原剂。从 Li2Ti[OiPr]4 与苯甲腈、苯乙烯、异构二苯乙烯氧化物和顺式二苯乙烯的反应中,为
Visible Light‐Driven, One‐pot Amide Synthesis Catalyzed by the B<sub>12</sub>Model Complex under Aerobic Conditions
was developed. It provides a convenient and efficient way to synthesize amides. Based on this method, trichlorinated organic compounds were converted into amides in the presence of an amine under aerobic conditions at room temperature in a one-pot procedure. Various trichlorinated organic compounds and an amine source, such as primary, secondary, and cyclic amines, have been evaluated for this transformation
Oxygen‐Controlled Catalysis by Vitamin B
<sub>12</sub>
‐TiO
<sub>2</sub>
: Formation of Esters and Amides from Trichlorinated Organic Compounds by Photoirradiation
作者:Hisashi Shimakoshi、Yoshio Hisaeda
DOI:10.1002/anie.201507782
日期:2015.12.14
An oxygen switch in catalysis of the cobalamin derivative (B12)‐TiO2 hybrid catalyst for the dechlorination of trichlorinated organiccompounds has been developed. The covalently bound B12 on the TiO2 surface transformed trichlorinated organiccompounds into an ester and amide by UV light irradiation under mild conditions (in air at room temperature), while dichlorostilbenes (E and Z forms) were formed