FGI-5E

1. DIBAL / H 3O +

5-e Stenphen reduction mostly for

https://www.wendangku.net/doc/019693130.html,.Syn, 1925, 3, 1874.2. HCl./ SnCl 2 / Et 2O

5-e.1R -CH 2-C

N 5-e.25-e.3-CH 2-C O H R -CH -C O

H

R'

R -CH -C

O R"

R'X / n -BuLi

CH 3I

R''MgBr

H 3O + 3. H 3O +OH OH