Six-Step Synthesis of (S)-Brevicolline from (S)-Nicotine
摘要:
A six-step synthesis of (S)-brevicolline from (S)-nicotine is reported. Regioselective trisubstitution of the pyridine ring of nicotine, followed by successive Suzuki cross-coupling and Buchwald amination reactions, afforded the enantiopure beta-carboline alkaloid, brevicolline.
SYNTHESIS AND REGIOSELECTIVE SUBSTITUTION OF 6-HALO-AND 6-ALKOXY NICOTINE DERIVATIVES
申请人:Comins Daniel L.
公开号:US20070232665A1
公开(公告)日:2007-10-04
The present invention provides active compounds for modulating nicotinic acetylcholine receptors and methods of making the same. The methods of preparing the active compounds utilize different intermediate compounds.
Synthesis of Enantiomerically Pure (−)-(<i>S</i>)-Brevicolline
作者:Siavosh Mahboobi、Wolfgang Wiegrebe、Alfred Popp
DOI:10.1021/np980492h
日期:1999.4.1
(-)-(S)-Brevicolline (1) and related beta-carbolines were synthesized using an enantiomericallypure Michael-acceptor synthon (3). Subsequent Pictet-Spengler reaction afforded the tetrahydro-beta-carboline skeleton, which, in turn, was transformed to the beta-carboline by catalytic dehydrogenation.
A new total synthesis of the pharmacologically active β-carboline alkaloid brevicolline is described. The new synthetic approach is based on a commercially available and inexpensive starting material and reagents leading to a practical synthesis of the racemic target molecule, the natural (S)-enantiomer, and its antipode. Initially, the construction of the β-carboline skeleton and functionalization
描述了具有药理活性的β-咔啉生物碱短链霉素的一种新的全合成方法。新的合成方法基于可商购且廉价的起始材料和试剂,导致外消旋靶分子的实际合成,天然(S)-对映异构体及其对映体。最初,已经完成了β-咔啉骨架的构建和C(4)位置的功能化。作为 Au 催化的加氢胺化反应的结果,获得了二氢吡咯结构单元的形成,随后进行了还原,从而产生了手性中间体。此处描述的合成路线的开发是为了确保外消旋短链霉菌碱在 11 个步骤中的可持续使用,与先前报道的方法相比,总产率提高了 48%。
SYNTHESIS AND REGIOSELECTIVE SUBSTITUTION OF 6-HALO- AND 6-ALKOXY NICOTINE DERIVATIVES
申请人:Comins Daniel L.
公开号:US20100331323A1
公开(公告)日:2010-12-30
The present invention provides active compounds for modulating nicotinic acetylcholine receptors and methods of making the same. The methods of preparing the active compounds utilize different intermediate compounds.