SYNTHESIS OF HETEROCYCLES
255
IV.F-13 Mori, M. et al., JOC, 59, 4542, 4993 and 5643; Takahashi, T. et
al., OM, 13, 3411; see also: Taguchi, T. et al., JACS, 116, 5469.
#
1. 1.3 eq Cp 2 ZrBu 2
THF, rt
►
2. CO
I 47% " Br
IV.F-14 Bloch, R. et al., TA, 5, 745; Lynch, G.P. et al., T, 50, 13299;
Kulkarni, S.J. et al., JOC, 59, 3998; Nakata, M. et al., BCJ, 67, 3057;
Kim, H.J. and Lee, J.H., H, 38, 1383.
OMs
C5H11
PhCH 2 NH 2
C4H9
OMs
I
W ~ ~ \ , N C 4 H 9
C s H n ^ r s r S ,
Bn 77%
IV.F-15 Savoia, D. et al, T, 50, 4709; North, M. et al., TL, 35, 8859;
Baxter, E.W. and Reitz, A.B., JOC, 59, 3175; Luo, T.M.H. et al., H, 38,
1393.
RNH 2
NaCNBH 3
MeOH
ΌR 35-85%
IV.F-16 Chan, W.H. et al., JCS(Pl), 2355.
C0 2 Et
ï
MeCN^^O^
ζ
y
R
. R'NH 2
^ — \
24-73%
C 0 2
E t
1. Hg(Cl) 2
2