One-Step Synthesis of Strained Bicyclic Carboxylic and Boronic Amino Esters via Ruthenium-Catalysed Tandem Carbene Addition/Cyclopropanation of Enynes
作者:Chloé Vovard-Le Bray、Hubert Klein、Pierre H. Dixneuf、Aurélie Macé、Fabienne Berrée、Bertrand Carboni、Sylvie Dérien
DOI:10.1002/adsc.201200117
日期:2012.7.9
The reaction of 1,6‐ and 1,7‐enynes, derived from carboxylic and boronic amino acids, with diazo compounds in the presence of the (cyclooctadiene)(pentamethylcyclopentadiene)ruthenium chloride complex [RuCl(cod)(C5Me5)] catalyst leads to the formation of strained bicyclic proline or homoproline derivatives in good yields. This catalytic transformation proceeds under mild conditions, in one step from
在(环辛二烯)(五甲基环戊二烯)钌氯化物[RuCl(cod)(C 5 Me 5)]存在下,衍生自羧酸和硼氨基酸的1,6-和1,7-烯炔与重氮化合物的反应催化剂导致以高收率形成应变的双环脯氨酸或高脯氨酸衍生物。这种催化转化是在温和的条件下进行的,一步一步是从容易得到的炔烃开始进行的,并被应用于各种保护基团。获得了对所形成的烯基链的高立体选择性和对脯氨酸衍生物的极好的非对映选择性。