SYNTHESIS OF HETEROCYCLES
287
IV.K.lb-13 Chan, W.L. et al., # , 38, 2023.
ce»-.», a»^ ^
NH 2
^ ^
Ν
X
H
47-92%
IV.K.lb-14 Ohsawa, A. et al., CPB, 42, 1768.
R 1. C1C0 2 R·
CH 2 C1 2 , 0 °C
Bu,S r ^ ^
N
+
l
C0 2 R*
|
72-89%, 4:1 to 20:1
C ° 2
R '
IV.K.lc.
7-Membered Heterocycles with 2 N's
IV.K.lc-1 Soufiaoui, M. et al., TL, 35, 8373.
or
EtO
xylene
microwave
80-98%
IV.K.lc-2 Robba, M. et al., H, 38, 811.
12N HC1
N=CHR Π»Α