• Title/Summary/Keyword: 1,1-Diacetates

Search Result 4, Processing Time 0.018 seconds

Studies on Biogenetic-type Synthesis of Natural Products (I). Synthesis and Reactions of Methyl 3-Hydroxymethylorsellinate (생합성적 방법을 이용한 천연물의 합성 (제1보). 메틸 3-히드록시메틸오르셀리네이트의 합성)

  • Lee, Eun;Suh Junghun;Hong, Won Pyo
    • Journal of the Korean Chemical Society
    • /
    • v.23 no.1
    • /
    • pp.30-36
    • /
    • 1979
  • Methyl 3-hydroxymethylorsellinate was synthesized from orcinol and various acetylation methods were studied. Two of three possible diacetates were prepared by short-interval acetylation procedure.

  • PDF

A Green Protocol for Catalytic Conversion of Epoxides to 1,2-Diacetoxy Esters with Phosphomolybdic Acid Alone or Its Supported on Silica Gel

  • Zeynizadeh, Behzad;Sadighnia, Leila
    • Bulletin of the Korean Chemical Society
    • /
    • v.31 no.9
    • /
    • pp.2644-2648
    • /
    • 2010
  • Catalytic conversion of structurally different epoxides to the corresponding 1,2-diacetoxy esters was carried out readily with phosphomolybdic acid alone or its supported on $SiO_2$. The reactions were carried out under solvolytic or solvent free conditions within 5-15 min at room temperature. The product 1,2-diacetates were obtained in high to excellent yields. Supporting of phosphomolybdic acid on $SiO_2$ showed the better catalytic activity than $Al_2O_3$. Conversion of optically pure R-(+)-styrene oxide to S-(+)-1,2-diacetoxy-1-phenylethane was carried with phosphomolybdic acid in high yield and stereospecificity.

Carbonylation of 1-Bromo-2,6-bis(bromomethyl)benzene Catalyzed by Cobalt Carbonyl

  • Sang Chul Shim;Shin Ae Chae;Dong Yeob Lee;Young Zoo Youn;Jae Goo Shim;Chil Hoon Doh
    • Bulletin of the Korean Chemical Society
    • /
    • v.14 no.4
    • /
    • pp.481-485
    • /
    • 1993
  • Dialkyl 1-bromobenzene-2,6-diacetates were easily prepared by the carbonylation of the moiety of benzylic bromide in 1-bromo-2,6-bis(bromomethyl)benzene with alcohol in the presence of NaOAc< TEX>${\cdot}$3H$_2$O and a catalytic amount of Co$_2$(CO)$_8$under the atmospheric pressure of carbon monoxide at room temperature in excellent yield. Alkyl 2,6-bis(alkoxymethyl)benzoates were obtained by the carbonylation of the moiety of aryl bromide in 1-bromo-2,6-bis(alkoxymethyl)-benzene, which derived from 1-bromo-2,6-bis(bromomethyl)benzene, alcohol, NaOR, and CH$_3$I under the same conditions. Alkyl 2,6-bis(carboxymethyl)benzoate was also obtained in a trace amount for 24 hrs at room temperature.