A NOVEL METHOD OF SYNTHESIZING TRANS-β-TERPINYL ESTERS FROM TRANS-TERPIN-1,8
A novel method of synthesizing trans-β-terpinyl esters based on selective elimination of one mole of carboxylic acid from trans-terpin-1,8 diesters with aliphatic acids C2 to C5 and benzoic acid has been described.Elimination reaction was carried out at temperature 120-190 deg C in media of acid anhydrides, in presence of sodium salt of the same acid.Terpinyl esters were obtained in 30-75percent yield.Selectivity of elimination has increased with increase in molecular weight of eliminated acid from 81percent for acetic to 94percent for n-pentanoic, and 95percent for benzoic.
Kaminska, Janina,Gora, Jozef
p. 757 - 765
(2007/10/02)
Biotransformation of 1-Acetoxy-p-menth-4(8)-ene with a Suspension of Cultured Cells of Nicotiana tabacum
The biotransformation of 1-acetoxy-p-menth-4(8)-ene with a suspension of cultured cells of Nicotiana tabacum was investigated.It was found that the cultured cells had the ability to hydroxylate stereoselectively the exocyclic double bond from the side opposite to the acetoxy group and regioselectively the allylic position of the exocyclic double bond.
Lee, Ym Sook,Hirata, Toshifumi,Suga, Takayuki
p. 2475 - 2478
(2007/10/02)
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