Regioselective Cross-Coupling Reactions as an Entry into Biologically Relevant Bithiazoles: First Total Synthesis of Cystothiazole E
作者:Thorsten Bach、Stefan Heuser
DOI:10.1002/1521-3773(20010903)40:17<3184::aid-anie3184>3.0.co;2-7
日期:2001.9.3
Pd-catalyzed cross-coupling reactions. It was thus possible to achieve the first synthesis of cystothiazole E (1) with a Suzuki coupling of the building blocks 2 and 3 as the pivotal C-C bond-formation step (94 % yield, TBDMS=tBuMe2 Si). The bithiazole 3 could be prepared very conveniently from 2,4-dibromothiazole by regioselective cross-coupling reactions.
在Bitdazole催化的交叉偶联反应中使用bithiazoles时,没有遇到任何问题。因此,作为关键的CC键形成步骤,可以通过构建基块2和3的Suzuki偶联来实现巯基噻唑E(1)的首次合成(94%的收率,TBDMS = tBuMe 2 Si)。可以通过区域选择性的交叉偶联反应很方便地由2,4-二溴噻唑制备Bithiazole 3。