Improved Conditions for the Proline-Catalyzed Aldol Reaction of Acetone with Aliphatic Aldehydes
作者:Benjamin List、Alberto Martínez、Kristina Zumbansen、Arno Döhring、Manuel van Gemmeren
DOI:10.1055/s-0033-1340919
日期:——
The proline-catalyzed asymmetric aldol reaction between aliphatic aldehydes and acetone has, to date, remained underdeveloped. Challenges in controlling this reaction include avoiding undesired side reactions such as aldol condensation and self-aldolization. In recent years we have developed optimized conditions, which enable high yields and good to excellent enantioselectivities, and which are presented
The present invention provides a fused heterocyclic compound having a tyrosine kinase inhibitory action, which is represented by the formula:
wherein
ring A is an optionally substituted benzene ring;
ring B is an optionally substituted benzoisothiazole ring;
R
1
is a hydrogen atom, a halogen atom, or an optionally substituted group bonded via a carbon atom, a nitrogen atom or an oxygen atom;
R
2
is a hydrogen atom, or an optionally substituted group bonded via a carbon atom or a sulfur atom;
R
3
is a hydrogen atom or an optionally substituted aliphatic hydrocarbon group;
or
R
1
and R
2
, or R
2
and R
3
are optionally bonded to each other to form an optionally substituted ring structure;
or
R
3
is optionally bonded to the carbon atom on ring A to form an optionally substituted ring structure;
or a salt thereof.
[EN] SULFONAMIDE COMPOUNDS HAVING TNAP INHIBITORY ACTIVITY<br/>[FR] COMPOSÉS DE SULFONAMIDE AYANT UNE ACTIVITÉ INHIBITRICE DE TNAP
申请人:DAIICHI SANKYO CO LTD
公开号:WO2018119444A1
公开(公告)日:2018-06-28
The present invention relates to a compound or a pharmacologically acceptable salt thereof having excellent tissue non-specific alkaline phosphatase inhibitory activity. The present invention provides a compound represented by the formula (I) or a pharmacologically acceptable salt thereof.
Processes for preparing beta-hydroxy-ketones and alpha,beta-unsaturated ketones
申请人:Barnicki Donald Scott
公开号:US20050004401A1
公开(公告)日:2005-01-06
Processes for producing β-hydroxy-ketones and α,β-unsaturated ketones are disclosed which comprise the crossed condensation of an aldehyde with a ketone in the presence of a hydroxide or alkoxide of alkali metal or an alkaline earth metal as catalyst. The products of the process, β-hydroxy-ketones and α,β-unsaturated ketones, are useful for the preparation of many commercially important products in the chemical process industries including solvents, drug intermediates, flavors and fragrances, other specialty chemical intermediates.
[EN] OXAZEPINE DERIVATIVES HAVING TNAP INHIBITORY ACTIVITY<br/>[FR] DÉRIVÉS D'OXAZÉPINE AYANT UNE ACTIVITÉ INHIBITRICE DE TNAP
申请人:DAIICHI SANKYO CO LTD
公开号:WO2018119449A1
公开(公告)日:2018-06-28
The present invention relates to a compound or a pharmacologically acceptable salt thereof having excellent tissue non-specific alkaline phosphatase inhibitory activity. The present invention provides a compound represented by the formula (I) or a pharmacologically acceptable salt thereof.