Electrophilic substitution in indoles. Part 13. The synthesis and rearrangement of 2-deuteriospiro[cyclopentane-3′-indolenine]
作者:Juana S. L. Ibaceta-Lizana、Anthony H. Jackson、Noojaree Prasitpan、Patrick V. R. Shannon
DOI:10.1039/p29870001221
日期:——
acid, 92% deuteriated at the indolyl 2-position. Reduction to the deuterioindolylbutanol and treatment of its toluene-p-sulphonate with potassium t-butoxide give 2-deuterio-spiro[cyclopentane-3′-(3H) indole] which was 88% deuteriated at the 2-position. The kinetics of the acid-catalysed rearrangement of the deuterioindolenine and its non-deuteriated analogue were measured and the ratio kH/kD of the pseudo-first-order
由N-苯基磺酰基吲哚通过锂化,用D 2 O淬灭并水解来制备2-氘代吲哚。用琥珀酸酐处理2-氘代吲哚格利雅试剂,得到4-(吲哚-3-基)-4-氧代丁酸,氘从2-位部分损失。以相同方式处理的2,3-二氘代吲哚(通过酸催化的2-氘代吲哚的氘代制备)得到吲哚基2-氧代丁酸,其在吲哚基2-位的氘代率为92%。还原为氘代吲哚基丁醇并用叔丁醇钾处理其甲苯对磺酸盐,得到2-氘代-螺[环戊烷-3'-(3 H)吲哚]在2位上氘化了88%。测量了氘代吲哚及其非氘代类似物的酸催化重排动力学,发现拟一级速率常数的比值k H / k D为1.08,表明同位素效应非常小。
IBACETA-LIZANA, JUANA S. L.;JACKSON, ANTHONY H.;PRASITPAN, NOOJAREE;SHANN+, J. CHEM. SOC. PERKIN TRANS.,(1987) N 9, 1221-1226
作者:IBACETA-LIZANA, JUANA S. L.、JACKSON, ANTHONY H.、PRASITPAN, NOOJAREE、SHANN+