A novel preparative method for γ-butyrolactams via carbon–carbon bond formation: copper or ruthenium-catalysed cyclization of N-allyl trichloroacetamides
作者:Hideo Nagashima、Hidetoshi Wakamatsu、Kenji Itoh
DOI:10.1039/c39840000652
日期:——
Trichlorinated γ-butyrolactams are formed by copper or ruthenium-catalysedcyclization of Nallyl tichloroacetamides.
三氯化γ-丁内酰胺是通过铜或钌催化的N烯丙基三氯乙酰胺的环化反应而形成的。
Transition metal catalyzed radical cyclization: new preparative route to .gamma.-lactams from allylic alcohols via the [3.3]-sigmatropic rearrangement of allylic trichloroacetimidates and the subsequent ruthenium-catalyzed cyclization of N-allyltrichloroacetamides
A sequence of reactions including [3.3]-sigmatropic rearrangement of allyl trichloroacetimidates (Overman rearrangement) followed by ruthenium-catalyzed cyclization of N-allyltrichloroacetamides provided a novel method for preparing trichlorinated gamma-lactams from allylic alcohols. No delta-lactam was formed as a byproduct. The cyclization of secondary N-allyltrichloroacetamides proceeded with good diastereoselectivity. Two types of tandem cyclizations to form bicyclic lactams took place in the cyclization of N-allyltrichloroacetamides from geraniol and linalool.
NAGASHIMA, HIDEO;WAKAMATSU, HIDETOSHI;ITOH, KENJI, J. CHEM. SOC. CHEM. COMMUN., 1984, N 10, 652-653
Ring closing metathesis of phenyl-substituted dienes
作者:M. Bujard、A. Briot、V. Gouverneur、C. Mioskowski
DOI:10.1016/s0040-4039(99)01768-2
日期:1999.12
A series of phenyl-substituted heterodienes 2a-f and 6 was prepared and subjected to ringclosingmetathesis (RCM) to give differently phenyl-substituted dihydropyrroles and dihydrofuran.
作者:Jozef Gonda、Miroslava Martinková、Andrea Zadrošová、Monika Šoteková、Jana Raschmanová、Patrik Čonka、Eva Gajdošíková、C. Oliver Kappe
DOI:10.1016/j.tetlet.2007.07.157
日期:2007.9
The microwave-assisted thermal aza-Claisen rearrangement of allylic imidates and thiocyanates to the corresponding amides and isothiocyanates is investigated. Significant accelerations of the rearrangement of allylic imidates to amides and of allylic thiocyanates to isothiocyanates in comparison with standard thermal reactions is observed.