[EN] BUT-2-ENE-1, 4-DIOLS AND METHODS FOR THE PREPARATION THEREOF<br/>[FR] BUT-2-ENE -1, 4-DIOLS ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:EUROPEAN THERMODYNAMICS LTD
公开号:WO2018060676A1
公开(公告)日:2018-04-05
Compounds are provided that are useful synthetic intermediates, particularly for the preparation of dialdehydes. The compounds have the formula (I): wherein Z is I, Br or CH2Ar2; Ar1 is 4-Y1C6H4 and Ar2 is Y2C6H4; Y1 and Y2 are independently H, Me or linear or branched C2-C12 alkyl, linear or branched C2-C12 alkenyl, OR1, OAr3, OCX3, SR1, SAr3, NR12, NAr32, NHAr3, F, CI, Br, Ar3, or a heteroaryl group; R1 is linear or branched C1-C12 alkyl; Ar3 is an aryl group; X is independently F, CI, Br or I. When Z is I, there is provided a method for its preparation by copper-catalysed carbocuparation of 2-butyne- 1,4-diol by a benzylic Grignard reagent Ar1CH2MgX and a copper(I) salt, followed by direct iodination. When Z is CH2Ar2, there is provided a method for its preparation by palladium-catalysed carbocuparation of an iodide using a palladium salt, a phosphine ligand and a benzylic zinc reagent Ar2CH2ZnX.
提供了一些有用的合成中间体,特别适用于制备二醛。这些化合物的化学式为(I):其中 Z 是 I、Br 或 CH2Ar2;Ar1 是 4-Y1C6H4,Ar2 是 Y2C6H4;Y1 和 Y2 独立地是 H、Me 或线性或支链的 C2-C12 烷基、线性或支链的 C2-C12 烯基、OR1、OAr3、OCX3、SR1、SAr3、NR12、NAr32、NHAr3、F、Cl、Br、Ar3 或杂环芳基;R1 是线性或支链的 C1-C12 烷基;Ar3 是芳基;X 独立地是 F、Cl、Br 或 I。当 Z 是 I 时,提供了一种通过铜催化的 2-丁炔-1,4-二醇与苄基格氏试剂 Ar1CH2MgX 和铜(I)盐进行碳-铜配位加成,然后直接碘化的制备方法。当 Z 是 CH2Ar2 时,提供了一种通过钯催化的碘化物使用钯盐、膦配体和苄基锌试剂 Ar2CH2ZnX 进行碳-铜配位加成的制备方法。