(ω-Ammonioalkyl)cyclopentadienides by Rhodium-Catalyzed Vinylcarbene Transfer to Semicyclic Enaminocarbonyl Compounds
摘要:
The rhodium(ll) catalyzed reaction of vinyldiazoacetate 2 with semicyclic beta-enaminocarbonyl compounds 1 provides (omega-(methylammonio)-alkyl)cyclopentadienides 3. This transformation represents a novel reaction cascade which combines carbenoid addition at a C=C bond with ring chain transformation. In some cases, products resulting from vinylcarbene insertion into the enaminic C-H bond of 1 are also isolated, These dienamines undergo subsequent isomerization to furnish betaines 3.
Synthesis of hexahydroindol-6-ones by reaction of 2-methylthiopyrrolinium salts with Nazarov reagents
作者:Joseph P. Michael、Mzwandile I. Zwane
DOI:10.1016/s0040-4039(00)61277-7
日期:1992.8
The title compounds 6 – 8 were prepared by variations of a route commencing with base-promoted condensation of N-substituted 2-methylthio-Δ1-pyrrolinium iodides 2 with Nazarov and related reagents, followed by further manipulation of substituted enamines 11 – 14.
GUGELCHUK, M. M.;HART, D. J.;TSAI, YEUN-MIN, J. ORG. CHEM., 1981, 46, N 18, 3671-3675
作者:GUGELCHUK, M. M.、HART, D. J.、TSAI, YEUN-MIN
DOI:——
日期:——
(ω-Ammonioalkyl)cyclopentadienides by Rhodium-Catalyzed Vinylcarbene Transfer to Semicyclic Enaminocarbonyl Compounds
作者:Gerhard Maas、Andreas Müller
DOI:10.1021/ol990546u
日期:1999.7.1
The rhodium(ll) catalyzed reaction of vinyldiazoacetate 2 with semicyclic beta-enaminocarbonyl compounds 1 provides (omega-(methylammonio)-alkyl)cyclopentadienides 3. This transformation represents a novel reaction cascade which combines carbenoid addition at a C=C bond with ring chain transformation. In some cases, products resulting from vinylcarbene insertion into the enaminic C-H bond of 1 are also isolated, These dienamines undergo subsequent isomerization to furnish betaines 3.