prepared from styrene and α-methylstyrene with thallium(III) acetate and isobutyrate in various alcohols. I(R1=H) reacts with copper(I) iodide, bromide, chloride, cyanide and thiocyanate to afford the corresponding alkyl halides and pseudohalides, C6H5CH(OR3)CH2X [II], in various organic solvents, acetonitrile being the solvent of choice for the purpose of preparing II. The addition of potassium salt
一些新的烯烃烷氧基铊(III)化合物,C6H5C(R1)(OR3)CH2Tl(OCOR2)2 [I],是由苯乙烯和α-甲基苯乙烯与乙酸铊(III)和异丁酸在各种醇中制备的。I(R1=H) 与碘化铜、溴化铜、氯化铜、氰化物和硫氰酸铜反应生成相应的烷基卤化物和拟卤化物,C6H5CH(OR3)CH2X[II],在各种有机溶剂中,乙腈是首选溶剂为了准备II。钾盐的加入对提高Ⅱ的收率有显着效果。卤代和假卤代脱卤发生在铊先前与烷基碳相连的位置。提出了一种离子协调的分子间方案作为制备 II 的反应机制。简要讨论了 I 的核磁共振和红外光谱数据。
Enzymatic resolution of the chiral inductor 2-methoxy-2-phenylethanol
作者:Marı́a I. Monterde、Rosario Brieva、Vı́ctor M. Sánchez、Miguel Bayod、Vicente Gotor
DOI:10.1016/s0957-4166(02)00246-x
日期:2002.6
Several lipase-catalyzed processes are evaluated for the resolution of 2-methoxy-2-phenylethanol, a chiral auxiliary in the synthesis of optically active 1,4-dihydropyridines. Candida antarctica lipase B (CAL B) catalyzes the enzymatic acylation of the primary alcohol with high enantioselectivity. (C) 2002 Elsevier Science Ltd. All rights reserved.
ARMSTRONG, DANIEL W.;LI, WEIYONG;STALCUP, APRYLL M.;SECOR, HENRY V.;IZAC,+, ANAL. CHIM. ACTA , 234,(1990) N, C. 365-380
作者:ARMSTRONG, DANIEL W.、LI, WEIYONG、STALCUP, APRYLL M.、SECOR, HENRY V.、IZAC,+
DOI:——
日期:——
METHOD FOR PRODUCING POLYETHERESTER CARBONATE POLYOLS
申请人:BAYER INTELLECTUAL PROPERTY GMBH
公开号:US20140329987A1
公开(公告)日:2014-11-06
The present invention relates to a method for producing polyetherester carbonate polyols by means of catalytic addition of carbon dioxide, alkylene oxides and cyclic anhydrides to H-functional starter compounds in the presence of double metal cyanide (DMC) catalysts.