Photochemistry of stilbenyl-pyrroles: a new approach to indole and isoindole derivatives
摘要:
A new 2-{2-[2-(4-methylphenyl)ethenyl]phenyl}pyrrole (11) was prepared and transformed by a photochemical reaction furnishing two cyclised products 4,5-dihydro-4-(p-methylphenyl)benzo[g]indole (12) and 4H-4-(p-methylbenzyl)pyrrolo[2,1-a]isoindole (13), and a reduction product, 2-{2-[2-(4-methylphenyl)ethyl]phenyl}pyrrole (14). (C) 2003 Elsevier Ltd. All rights reserved.
Hf(OTf)<sub>4</sub>-Catalyzed highly diastereoselective synthesis of 1,3-disubstituted tetralin derivatives via benzylic C(sp<sup>3</sup>)–H bond functionalization
作者:Taira Yoshida、Keiji Mori
DOI:10.1039/c7cc01717k
日期:——
A highly diastereoselective synthesis of 1,3-disubstituted tetralin derivatives was achieved via Hf(OTf)4-catalyzed benzylic C(sp3)-H bond functionalization.
The catalytic asymmetric [1,5]-hydride transfer/cyclization sequence involving benzylicC(sp3)H bond was established, providing tetrahydronaphthalene derivatives in moderate to high yield with up to 69% ee, by employing the copper complex of side-armed bisoxazoline as chiral catalyst.
Synthesis of substituted benzooxaborinin-1-ols via palladium-catalysed cyclisation of alkenyl- and alkynyl-boronic acids
作者:Laure Benhamou、Daniel W. Walker、Dejan-Krešimir Bučar、Abil E. Aliev、Tom D. Sheppard
DOI:10.1039/c6ob01419d
日期:——
Two newpalladium-catalysed reactions have been developed for the synthesis of stable 4-substituted benzooxaborinin-1-ols. A palladium-catalysed cyclisation of ortho-alkenylbenzene boronic acids can be used to access 4-chlorobenzooxaborinin-1-ols via a Wacker-type oxidation and chlorination. Alternatively, ortho-alkynylbenzene boronic acids undergo a palladium-catalysed oxyallylation reaction to provide