USEFUL SYNTHETIC PREPARATIONS
VLA.11-15 Desai, R.C. et al., SL, 933.
371
NH
CH 2 Q, HBr-HOAc.
R
L
/
X = CO, S 0 2
R
R
O
N
Br
50-100 %
VI.A.11-16 Singh, P.K. and Khanna, R.N., TL, 35, 3753.
FeCl 3 , HCIO4
AcOH
95%
VI.A.11-17 Delia, E.W. and Taylor, D.K., JOC, 59, 2986; Jorgensen, K.A.
et al., JOC, 59, 3543.
Me0 2 C
O S.
O—N
7 \
CF 3 CHClBr
hv M e 0 2 C — « )—CI
82%