摘要:
Disclosed is a cyclopropanation process comprising the step of reacting an alkene compound having at least one carbon-carbon double bond with at least one dihaloalkane. The reaction is carried out in the presence of (i) particulate metal Zn, (ii) catalytically effective amount of particulate metal Cu or a salt thereof, (iii) at least one haloalkylsilane, and (iv) at least one solvent.
摘要:
Synthetic methods and processes for preparation of perhydro-3,6-dimethyl-2-benzo[b]furanones, in particular dihydromintlactone, and analogs through reaction of dehydrogenation of menthanediols and analogs with a base in the presence of (carbonylchlorohydrido[bis-(2-diphenylphosphinoethyl)amine]ruthenium(II) as catalyst in good stereoselectivity and yields under stereochemistry controlled conditions are disclosed.
摘要:
Disclosed is a process for preparing unsaturated malonates and/or their isomers. The process includes the step of reacting an aldehyde and a dialkyl malonate in the presence of a Lewis acid and a carboxylic acid thereby forming an unsaturated malonate.
摘要:
The invention provides a process for the preparation of alkyl 4-methyl-6-(2,6,6-trimethylcyclohex-lenyl) hex-3-enoate comprising a single step wherein 2-methyl-4-(2,6,6- trimethylcyclohex-l-en-l-yl)butanal is reacted with monoalkyl malonate.