Umpolung Strategy for Arene C−H Etherification Leading to Functionalized Chromanes Enabled by I(III)
<i>N</i>
‐Ligated Hypervalent Iodine Reagents
作者:Myriam Mikhael、Wentao Guo、Dean J. Tantillo、Sarah E. Wengryniuk
DOI:10.1002/adsc.202100809
日期:2021.11.9
The direct formation of aryl C−O bonds via the intramolecular dehydrogenativecoupling of a C−H bond and a pendant alcohol represents a powerful synthetic transformation. Herein, we report a method for intramolecular arene C−H etherification via an umpoled alcohol cyclization mediated by an I(III) N-HVI reagent. This approach provides access to functionalized chromane scaffolds from primary, secondary
The present invention provides a compound represented by the following formula (I) or its pharmaceutically acceptable salt:
[wherein, R
1
represents optionally substituted C
1-4
alkyl, n shows integer of 1 to 4, R
2
represents optionally substituted C
1-4
alkyl or hydrogen atom, R
3
represents optionally substituted C
1-4
alkyl, R
4a
, R
4b
, R
4c
, and R
4d
, similarly or differently, represent optionally substituted C
6-14
aryl, optionally substituted C
1-4
alkyl, or hydrogen atom and the like, A represents optionally substituted C
6-14
aryl or optionally substituted 5 to 11 membered heteroaryl].
Harnessing Applied Potential: Selective β-Hydrocarboxylation of Substituted Olefins
作者:Anas Alkayal、Volodymyr Tabas、Stephanie Montanaro、Iain A. Wright、Andrei V. Malkov、Benjamin R. Buckley
DOI:10.1021/jacs.9b13305
日期:2020.1.29
The construction of carboxylic acid compounds in a selective fashion from low value materials such as alkenes remains a long-standing challenge to synthetic chemists. In particular, β-addition to styrenes is underdeveloped. Herein we report a new electrosynthetic approach to the selective hydrocarboxylation of alkenes that overcomes the limitations of current transition metal and photochemical approaches
[EN] AMINOPYRIMIDINES AS SYK INHIBITORS<br/>[FR] AMINOPYRIMIDINES EN TANT QU'INHIBITEURS DE LA SYK
申请人:MERCK SHARP & DOHME
公开号:WO2011075515A1
公开(公告)日:2011-06-23
The present invention provides novel pyrimidine amines of formula (I) which are potent inhibitors of spleen tyrosine kinase, and are useful in the treatment and prevention of diseases mediated by said enzyme, such as asthma, COPD and rheumatoid arthritis.
Process for the preparation of enantiomerically enriched cyclic beta-aryl or heteroaryl carbocyclic acids
申请人:Bachmann Stephan
公开号:US20070232653A1
公开(公告)日:2007-10-04
The present invention relates to a process for the preparation of cis substituted cyclic β-aryl or heteroaryl carboxylic acid derivatives in high diastereo- and enantioselectivity by enantioselective hydrogenation in accordance with the following scheme
wherein
X, Ar, n, and m are defined herein and corresponding salts thereof.