[1] Univ Nottingham, Dept Chem, Nottingham NG7 2RD, England
来源:
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1
|
1999年
/
15期
关键词:
D O I:
10.1039/a902411e
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Overall 5-endo-trig iodocyclizations of homoallylic alcohols, with a range of substitution patterns, leading to beta-iodotetrahydrofurans are usually highly efficient and stereoselective when carried out in anhydrous acetonitrile in the presence of sodium hydrogen carbonate. Such cyclizations, which are not exceptions to Baldwin's rules as they are electrophile-driven, appear to proceed via a well-ordered chair-like transition state. The iodine can be replaced by hydroxy, acetoxy and azide groups.