| abstract |
The present invention relates to a preparation method of dimethyl 3-(3-oxy-2-pentyl)cyclopentylmalonate. The 3-(3-oxy-2-pentyl)cyclopentylmalonic acid The preparation method of dimethyl ester comprises: in the presence of transition metal complex and catalytic promoter, 2-pentyl-2-cyclopentenone and dimethyl malonate are reacted in a reaction solvent to obtain the 3- Dimethyl (3-oxy-2-pentyl)cyclopentylmalonate. The preparation method provided by the invention does not need to use a strong base catalyst of sodium methoxide, avoids the generation of salt-containing wastewater, is environmentally friendly, has high yield, and simultaneously realizes the recycling of the catalyst. |