Nucleophile-Dependent Regioselective Reaction of (<i>S</i>)-4-Benzyl-2-Fluoroalkyl-1,3-Oxazolines
作者:Haizhen Jiang、Liuming Yan、Minjun Xu、Wenjun Lu、Yeshan Cai、Wen Wan、Jianhua Yao、Shaoxiong Wu、Shizheng Zhu、Jian Hao
DOI:10.1021/jo400073d
日期:2013.5.3
unimolecular radical nucleophilic substitution (SRN1) at the terminal bromine atom of the CF2Br group when arenolates were employed as the nucleophiles. The reaction of (S)-4-benzyl-2-trifluoromethyl-1,3-oxazoline with nucleophiles such as arenethiols, arenols, and TMSCl underwent nucleophilic ring opening in a regiospecific way, while the use of TMSCF3 was determined to proceed through nucleophilic addition to
通过实验和理论研究了(S)-4-苄基-2-氟烷基-1,3-恶唑啉与不同类型氟化物的亲核反应中亲核试剂的区域选择性。(S)-4-苄基-2-溴二氟甲基-1,3-恶唑啉的开环仅在1,3-恶唑啉环的C5位置发生,而对于单分子自由基亲核取代观察到完全不同的区域选择性当使用壬酸酯作为亲核试剂时,CF 2 Br基团的末端溴原子上的(S RN 1)(S RN 1)。(S的反应)-4-苄基-2-三氟甲基-1,3-恶唑啉与亲核试剂(如芳硫醇,槟榔和TMSC1)以区域特异性方式经历亲核开环,而TMSCF 3的使用被确定为通过向C中进行亲核加成而进行bondN键。