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.
The Cs2CO3-catalyzed reaction of 2-oxindoles with enones affords 2,2-disubstituted indolin-3-ones through domino “Michael addition–oxidation–ring-cleavage–C–N coupling” process. O2 acts as the sole oxidant to accomplish the oxidative process. The indolin-3-ones can be further transformed to pyridazine, azirdine-fused 3-oxindoles, 4-quinolone derivatives easily.
Cs 2 CO 3催化的2-氧吲哚与烯酮的反应通过多米诺“迈克尔加成-氧化-环断裂-C-N偶联”过程得到2,2-二取代的吲哚-3-酮。O 2充当完成氧化过程的唯一氧化剂。吲哚-3-酮可以容易地进一步转化为哒嗪,阿兹丁稠合的3-氧吲哚,4-喹诺酮衍生物。
Triazoles of formula: ##STR1## wherein R.sub.1 is alkenyl, alkynyl or optionally substituted aralkyl; Y is .dbd.N--, R.sub.2 is cycloalkyl, alkyl or haloalkyl, and R.sub.3 is H, methyl or alkenyl, or esters, ethers, salts and metal complexes thereof. The triazoles have fungicidal and plant growth regulating activity.
A process for producing a triazolylvinyl ketone compound of the formula: ##STR1## wherein X is a hydrogen or chlorine atom, comprising heating a compound of the formula: ##STR2## wherein X is as defined above. The triazolylvinyl ketone compound is useful as agricultural fungicides.