Stereoselective syntheses of chiral (3S,9bS)-1,2,3,9b-tetrahydro-5H-imidazo[2,1-a]isoindol-5-ones
摘要:
Chiral (3S,9bS)-1,2,3,9b-tetrahydro-5H-imidazo[2,1-a]isoindol-5-ones 11a-11f, 14b.14c and 17a,b were prepared in 78-93% yields with high stereoselectivities (d.e. >99%) by the intermolecular condensations of 2-formylbenzoic acids 10 or 13 or 2-acetylbenzoic acid 15 with chiral diamines 9a-9f and 9h. Compounds 9a-9f and 9h were readily prepared in three steps from optically active N-Boc-alpha-amino acids 5a-5d. (C) 2002 Elsevier Science Ltd. All rights reserved.
<scp>Palladium‐Catalyzed</scp>
Tandem Carbonylative
<scp>Aza‐Wacker‐Type</scp>
Cyclization of Nucleophile Tethered Alkene to Access Fused
<scp>
<i>N</i>
‐Heterocycles
</scp>
作者:Lijun Shi、Mingshan Wen、Fuwei Li
DOI:10.1002/cjoc.202000491
日期:2021.2
tandem reactions offer rapid access to structurally complex molecules in one‐pot reaction, the selectivity issue needs to be addressed particularly when incompatible step reactions are involved. Herein, we report the selective synthesis of fused N‐heterocycles from nucleophile‐tethered alkenylamide and carbon monoxide via palladium (Pd)‐catalyzed tandem carbonylative aza‐Wacker‐type cyclization. The
Stereoselective syntheses of chiral (3S,9bS)-1,2,3,9b-tetrahydro-5H-imidazo[2,1-a]isoindol-5-ones
作者:Alan R. Katritzky、Hai-Ying He、Akhilesh K. Verma
DOI:10.1016/s0957-4166(02)00220-3
日期:2002.6
Chiral (3S,9bS)-1,2,3,9b-tetrahydro-5H-imidazo[2,1-a]isoindol-5-ones 11a-11f, 14b.14c and 17a,b were prepared in 78-93% yields with high stereoselectivities (d.e. >99%) by the intermolecular condensations of 2-formylbenzoic acids 10 or 13 or 2-acetylbenzoic acid 15 with chiral diamines 9a-9f and 9h. Compounds 9a-9f and 9h were readily prepared in three steps from optically active N-Boc-alpha-amino acids 5a-5d. (C) 2002 Elsevier Science Ltd. All rights reserved.