USEFUL SYNTHETIC PREPARATIONS
363
VLA.9-12 Moutel, S. and Prandi, J., TL, 35, 8163.
OMe
OMe
A C O - ^ - - - T - - ^ /
— ~
Bu 3 SnH, AIBN, air
AcO '
Ph-Me, 60°C
2: AC2O, pyr
Ac
oA c
° OAc
8 2 %
VLA.9-13 Abe, M. and Oku, A., TL, 35, 3551; see also: Sorokin, V.L. and
Kulinkovich, O.G., S, 361.
Ri
OR3
R
2
AAoMe
quinone
R2
Rl
O
ΛΛ OMe
33-86 %
VI.A.9-14 Yamada, Y. et al., CPB, 42, 405; Boaz, N.W. and Zimmerman,
R.L., TA, 5, 153; Achiwa, K. et al., SL, 289; Schick, H. et al., LA, 1019;
Fang, J.M. et al., JOC, 59, 6018; Vanttinen, E. and Kanerva, L.T., JCS(Pl),
3459; Pallavicini, M. et al., JOC, 59, 1751; Basavaiah, D. and Rao, P.D.,
TA, 5, 223; Kazlauskas, R.J. et al., TA, 5, 83; Allevi, P. et al., TA, 5,13;
Naemura, K. et al., JCS(Pl), 1253; Mallavadhani, U.V. and Rao, Y.R., TA,
5, 23; Gil, G. et al., TL, 35, 8787; Berkowitz, D.B. et al., TL, 35, 8743; for
thiols see also: Helmchen, G. et al., T, 50,7109.
RIO
OH
OH
R 2
lipase PS
ni*
2
OAc
R2
* I l
31-48 %
46-99 % e.e.
31-52 %
69-92 % e.e.