A facile method for the rapid and selective deprotection of methoxymethyl (MOM) ethers
摘要:
We describe a rapid and efficient method for selective deprotection of methoxymethyl (MOM) ethers using ZnBt(2) and n-PrSH, which completely removed MOM from diverse MOM ethers of primary, secondary. and tertiary alcohols or phenol derivatives The deprotection takes less than ten minutes with both high yield and selectivity in the presence of other protecting groups In addition, the rapid deprotection of MOM ethers of tertiary hydroxyls in high yield with no epimerization allows MOM to be a suitable protecting group for tertiary alcohols (C) 2010 Elsevier Ltd All rights reserved
A facile method for the rapid and selective deprotection of methoxymethyl (MOM) ethers
摘要:
We describe a rapid and efficient method for selective deprotection of methoxymethyl (MOM) ethers using ZnBt(2) and n-PrSH, which completely removed MOM from diverse MOM ethers of primary, secondary. and tertiary alcohols or phenol derivatives The deprotection takes less than ten minutes with both high yield and selectivity in the presence of other protecting groups In addition, the rapid deprotection of MOM ethers of tertiary hydroxyls in high yield with no epimerization allows MOM to be a suitable protecting group for tertiary alcohols (C) 2010 Elsevier Ltd All rights reserved
Wacker-Type Oxidation of Internal Alkenes using Pd(Quinox) and TBHP
作者:Ryan J. DeLuca、Jennifer L. Edwards、Laura D. Steffens、Brian W. Michel、Xiaoxiao Qiao、Chunyin Zhu、Silas P. Cook、Matthew S. Sigman
DOI:10.1021/jo302638v
日期:2013.2.15
The Pd-catalyzed TBHP-mediated Wacker-type oxidation of internal alkenes is reported. The reaction uses 2(4,5-dihydro-2-oxazolyl)quinoline (Quinox) as ligand and TBHP(aq) as oxidant to deliver single ketone constitutional isomer products in a predictable fashion from electronically biased olefins. This methodology is showcased through its application on an advanced intermediate in the total synthesis of the antimalarial drug artemisinin.
A facile method for the rapid and selective deprotection of methoxymethyl (MOM) ethers
We describe a rapid and efficient method for selective deprotection of methoxymethyl (MOM) ethers using ZnBt(2) and n-PrSH, which completely removed MOM from diverse MOM ethers of primary, secondary. and tertiary alcohols or phenol derivatives The deprotection takes less than ten minutes with both high yield and selectivity in the presence of other protecting groups In addition, the rapid deprotection of MOM ethers of tertiary hydroxyls in high yield with no epimerization allows MOM to be a suitable protecting group for tertiary alcohols (C) 2010 Elsevier Ltd All rights reserved