Iridium-Catalyzed Enantioselective α-Allylic Alkylation of Amides Using Vinyl Azide as Amide Enolate Surrogate
作者:Aditya Chakrabarty、Santanu Mukherjee
DOI:10.1021/acs.orglett.0c03002
日期:2020.10.2
Among the unstabilized enolatesused as nucleophiles in iridium-catalyzed asymmetric allylic alkylation reactions, amideenolates are the least explored. Vinyl azides are now employed as amideenolate surrogates in Ir-catalyzed asymmetric allylic alkylation with branched allylic alcohols as the allylic electrophile. Competing reaction pathways are suppressed through the systematic tuning of the steric
Benzenesulfonyl-chromane, thiochromane, tetrahydronaphthalene and related gamma secretase inhibitors
申请人:Asberom Theodros
公开号:US20070197581A1
公开(公告)日:2007-08-23
This invention discloses novel gamma secretase inhibitors of the formula:
R
2
and R
3
, or R
2
and R
4
, or R
3
and R
4
, together with the atoms to which they are bound, can form a fused cycloalkyl or fused heterocycloalkyl ring. The cycloalkyl ring or the heterocycloalkyl ring can be optionally substituted with one or more substitutents. One or more compounds of formula (I), or formulations comprising such compounds, may be useful, e.g. in treating Alzheimer's Disease.
BENZENESULFONYL-CHROMANE, THIOCHROMANE, TETRAHYDRONAPHTHALENE AND RELATED GAMMA SECRETASE INHIBITORS
申请人:Asberom Theodros
公开号:US20120264736A1
公开(公告)日:2012-10-18
This invention discloses novel gamma secretase inhibitors of the formula:
R
2
and R
3
, or R
2
and R
4
, or R
3
and R
4
, together with the atoms to which they are bound, can form a fused cycloalkyl or fused heterocycloalkyl ring. The cycloalkyl ring or the heterocycloalkyl ring can be optionally substituted with one or more substituents. One or more compounds of formula (I), or formulations comprising such compounds, may be useful, e.g. in treating Alzheimer's Disease.