Enantioselective synthesis of 1-alkyl-substituted 1-phenyl-1,2-ethanediols using a myrtenal-derived chiral auxiliary
摘要:
The enantioselective synthesis of several 1-phenyl-1,2-ethanodiol derivatives using 2-benzoyl-1,3-oxathiane 1 as a chiral auxiliary is described. Nucleophilic additions of Grignard reagents, methyl lithium and LS-Selectride on benzoyloxathiane 1 proceeded in >95% diastereomeric ratio (dr) affording the corresponding tertiary carbinols, which were successively hydrolyzed and reduced to give the title derivatives in >95% enantiomeric excess (ee). (C) 2003 Elsevier Ltd. All rights reserved.
Enantioselective synthesis of 1-alkyl-substituted 1-phenyl-1,2-ethanediols using a myrtenal-derived chiral auxiliary
摘要:
The enantioselective synthesis of several 1-phenyl-1,2-ethanodiol derivatives using 2-benzoyl-1,3-oxathiane 1 as a chiral auxiliary is described. Nucleophilic additions of Grignard reagents, methyl lithium and LS-Selectride on benzoyloxathiane 1 proceeded in >95% diastereomeric ratio (dr) affording the corresponding tertiary carbinols, which were successively hydrolyzed and reduced to give the title derivatives in >95% enantiomeric excess (ee). (C) 2003 Elsevier Ltd. All rights reserved.