Pivotal Role of (<i>E</i>)-3-Carbamoyl-1-propenylboronic Acid in the Combination of Suzuki-Miyaura Coupling and Enzyme Reactions: Synthesis of (<i>3E</i>,<i>5E</i>)- and (<i>3E</i>,<i>5Z</i>)-6-Phenyl-3,5-hexadienoic Acid
作者:Takeshi Sugai、Masahiro Yokoyama、Takahiro Yamazaki、Hiromichi Ohta
DOI:10.1246/cl.1997.797
日期:1997.8
The first example of the enzyme-catalyzed hydrolysis of a nitrile bearing alkenylboronic acid functionality and its application to the synthesis of dienecarboxylic acids are described. (E)-3-Carbamoyl-1-propenylboronic acid was obtained by an incubation of the corresponding nitrile with Rhodococcus rhodochrous IFO 15564. Palladium(0)-catalyzed cross-coupling reaction of the product with (E)- and (Z)-bromoalkenes afforded the (3E,5E)- and (3E,5Z)-unsaturated amides, respectively. The second incubation of the above amides with the same microorganism provided the carboxylic acids with the defined configuration of conjugated double bonds.
本文介绍了酶催化水解带有烯基硼酸官能团的腈的第一个实例及其在合成二烯羧酸中的应用。(E)-3-Carbamoyl-1-propenylboronic acid 是通过相应的腈与 Rhodococcus rhodochrous IFO 15564 培养得到的。在钯(0)催化下,产物与(E)-和(Z)-溴烯发生交叉偶联反应,分别得到(3E,5E)-和(3E,5Z)-不饱和酰胺。将上述酰胺与同一微生物进行第二次培养,可得到具有共轭双键定义构型的羧酸。