350
ORGANIC SYNTHESIS—1995
VLA.6-11 Whitby, R.J. et al., 7L, 35, 1445.
χΐχ
Jt
l:Cp 2 ZrBu 2 ,-78°Ctort
2:Me 2 RSiCN,THF,A
R — R ·
VI.A.6-12 Yamamoto, Y. et al., TL, 35, 7395 and CC, 1201; Crotti, P. et
al., TL, 35,7089; Davis, F.A. and Zhou, P., TL, 35, 7525; Rajappa, S. et
al., TL, 35, 6133.
RI
R2
.N
R 2 NH, Yb(OTf) 3
^ < j ^ R 3
- RI
NHR2
R3
NR 2
42-100 %
VI.A.6-13 Edwards, M.L. et al., T, 50, 5579; Tsunoda, T. et al., CL, 539;
Saladino, R., Crestini, C , and Nicoletti, R., H, 38, 567; Hiemstra, H. et al.,
SL, 368; Murahashi, S.I. et al., JOC, 59, 2282; Kim, K. et al., JOC, 59,
6179; see also: Chen, S.F. et al., JMC, 37, 2232.
OH
Me. JTï
N
s OBz
MeNHTf, DEAD
Ph 3 P, THF
OBz
58%
ORGANIC SYNTHESIS—1995
VLA.6-11 Whitby, R.J. et al., 7L, 35, 1445.
χΐχ
Jt
l:Cp 2 ZrBu 2 ,-78°Ctort
2:Me 2 RSiCN,THF,A
R — R ·
VI.A.6-12 Yamamoto, Y. et al., TL, 35, 7395 and CC, 1201; Crotti, P. et
al., TL, 35,7089; Davis, F.A. and Zhou, P., TL, 35, 7525; Rajappa, S. et
al., TL, 35, 6133.
RI
R2
.N
R 2 NH, Yb(OTf) 3
^ < j ^ R 3
- RI
NHR2
R3
NR 2
42-100 %
VI.A.6-13 Edwards, M.L. et al., T, 50, 5579; Tsunoda, T. et al., CL, 539;
Saladino, R., Crestini, C , and Nicoletti, R., H, 38, 567; Hiemstra, H. et al.,
SL, 368; Murahashi, S.I. et al., JOC, 59, 2282; Kim, K. et al., JOC, 59,
6179; see also: Chen, S.F. et al., JMC, 37, 2232.
OH
Me. JTï
N
s OBz
MeNHTf, DEAD
Ph 3 P, THF
OBz
58%