USEFUL SYNTHETIC PREPARATIONS
395
VI.F-16 Roy, S. et al., CC, 1993; Zhang, Y. et al., SC, 24, 2893; Bhar, D.
and Chandrasekaran, S., S, 785; Leriverend, C. and Metzner, P., S, 761;
Freeman, F. et al., S, 699; Derbesy, G. and Harpp, D.N., TL, 35, 5381 ;
Suzuki, H. et al., JCR(S), 70; Zhang, Y. et al., TL, 35, 8833; Guibe, F. et
al., TL, 35, 9035.
CoCl 2 , MeCN
R-S-S-R'
R-SH + R'-X
*► K-s-s-K
24-97 %
VI.F-17 Wright, S.W., TL, 35, 1331; Yoshifuji, M. et al., TL, 35, 4379;
Fuchs, P.L. et al., JOC, 59, 348.
Ri
Ri
S
\ _ c o R 2 1=LDA,TMSC1.
\ _ / -
1/
2=ΗΑ-7Λ
R ^ 0 R 2
62-90 %
VI.F-18 Braverman, S. et al., TL, 35, 953.
O
T
DABCO,CH 2 Cl 2 ,rt^
95%
VI.F-19 Mahadevan, A. and Fuchs, P.L., TL, 35, 6025.
2: RCHO
H
R
56-84 %