Preparation of aromatic farnesol analogues via a Cu(I)-mediated Grignard coupling of THP ethers
摘要:
A Cu(I)-mediated reaction of aromatic Grignard reagents with allylic tetrahydropyranyl ethers results in formation of the coupled products in good yields. This methodology allows facile synthetic manipulation of compounds with two reactive allylic positions. (C) 1998 Elsevier Science Ltd. All rights reserved.
A practical and greener method of the cross-coupling of vinylethylene carbonates (VECs) with arylboronicacids has been described. The coupling reaction was catalyzed by in situ generated palladium nanoparticles (PdNPs) without any ligands and additional stabilizers in water under ambient conditions to provide useful 4-hydroxylprenylarenes and their derivatives in good to high yields.
Palladium catalyzed coupling of organostannanes with vinyl epoxides
作者:David R. Tueting、Antonio M. Echavarren、J.K. Stille
DOI:10.1016/0040-4020(89)80010-9
日期:1989.1
The coupling reaction of organotin reagents with vinyl epoxides, catalyzed by palladium, takes place at ambient temperatures, regioselectively, giving predominately the 1,4-addition product. Both aryl- and vinylstannanes undergo coupling in high yields, while acetylenic, allylic and benzylic tin reagents either give low yields or fail to couple. Although the double bond geometry in the vinylstannane