PROTECTING GROUPS
323
V.C-5 Bernatowicz, M.S. et al., TL, 35, 1651.
/ f
y—OMe /
R
H O - /
\ = /
P
R—C0 2 H
2
DCC, DMAP, 4°C to rt
\
//
\
('
X )—OMe
removed with 1 % TFA
28-93 %
V.C-6 Akiyama, T., Ozaki, S. et al., SC, 24, 2179.
O
O
PhNMe 2 , A1C1 3
Ph
" ^
OR
PIT ^
OH
R = MOM, MEM, SEM
80-99 %
V.C-7 Fisher, J.W. and Trinkle, K.L., TL, 35, 2505; Khurana, J.M. and
Sehgal, A., OPP, 26, 580.
R2
O
R 2
°
K
u
I II
R
1 ^ ^ΓΝ^ ^»v
U I . E t O A c A
>*^ ^ ^
^ΟΗ
O
"
26-98 %
V.C-8 Cossy, J. et al., TL, 35, 1539.
O
J ^
1 ^
I 2 , cyclohexane, r t >
R _ C 0 2 H
R
Ç f ^ ^ ^
75.97 %
323
V.C-5 Bernatowicz, M.S. et al., TL, 35, 1651.
/ f
y—OMe /
R
H O - /
\ = /
P
R—C0 2 H
2
DCC, DMAP, 4°C to rt
\
//
\
('
X )—OMe
removed with 1 % TFA
28-93 %
V.C-6 Akiyama, T., Ozaki, S. et al., SC, 24, 2179.
O
O
PhNMe 2 , A1C1 3
Ph
" ^
OR
PIT ^
OH
R = MOM, MEM, SEM
80-99 %
V.C-7 Fisher, J.W. and Trinkle, K.L., TL, 35, 2505; Khurana, J.M. and
Sehgal, A., OPP, 26, 580.
R2
O
R 2
°
K
u
I II
R
1 ^ ^ΓΝ^ ^»v
U I . E t O A c A
>*^ ^ ^
^ΟΗ
O
"
26-98 %
V.C-8 Cossy, J. et al., TL, 35, 1539.
O
J ^
1 ^
I 2 , cyclohexane, r t >
R _ C 0 2 H
R
Ç f ^ ^ ^
75.97 %