Oxidation of Nonactivated Anilines to Generate <i>N</i>-Aryl Nitrenoids
作者:Tianning Deng、Wrickban Mazumdar、Russell L. Ford、Navendu Jana、Ragda Izar、Donald J. Wink、Tom G. Driver
DOI:10.1021/jacs.9b13599
日期:2020.3.4
and selective C-NAr and C-C bond formation to yield spirocyclic- or bicyclic 3H-indoles or benzazepinones. Our experiments demonstrate the breadth of these oxidative processes, uncover underlying fundamental elements that control selectivity and demonstrate how the distinct reactivi-ty patterns embedded in N-aryl nitrenoid reactive intermediates can enable access to functionalized 3H-indoles or benzazepinones
A highly chemo- and regioselective Friedel–Craftsalkylation reaction of furans and thiophenes has been developed, which relies on the activation from the remote conjugated Mukaiyama silyl enol ether motif. Excellent enantioslectivity is generally obtained in reactions with α,β-unsaturated aldehydes under the well-established iminium ion catalysis of a chiral secondary amine.
An efficient rhodium‐catalyzed asymmetrichydrogenation of challenging tetrasubstituted cyclic enamides has been developed, affording cyclic chiral amides with high yields and excellent enantioselectivities (up to 99% yield and >99% ee). This novel methodology provides an efficient and concise synthetic route to chiral cycloalkylamines with two contiguous stereogenic centers. The potential utility
Nouvelle methode de synthese des (furyl-2)-2 cyclanones
作者:O Duval、L.Mavoungou Gomès
DOI:10.1016/s0040-4020(01)89082-7
日期:——
A high yield new synthesis of 2-(2-furyl)-cycloalkanones is described. The first step consists in a condensation of 2,5-dimethoxy-2,5-dihydro-furan with various cyclic β-ketoesters in acidic medium. The decarboalkoxylation is then realised in the presence of lithium chloride and in a polar aprotic solvent according a modified Krapcho reaction. This synthesis is extended to cyclopentanone, cyclohexanone
A convenient synthesis of 2-(2-furyl)-cycloalkanones : an application to benzo[c]phenanthridone ring formation
作者:O Duval、L.Mavoungou Gomès
DOI:10.1016/0040-4039(88)85132-3
日期:1988.1
An easy, high yield synthesis of 2-(2-furyl)-cycloalkanones is described in conjunction with an integrated strategy to a useful construction of benzo[c]phenanthridone alkaloid analogs.