p. 2250 - 2259
(2007/10/03)syn-1-[N-(tert-butoxycarbonyl)amino]-3-fluoromethyl-1-cyclobutane-1-carboxylic acid t-butyl ester
3-benzyloxymethyl-cyclobutanone
anti-1-[N-(tert-butoxycarbonyl)amino]-3-fluoromethyl-1-cyclobutane-1-carboxylic acid t-butyl ester
3-(benzyloxymethyl)-2,2-dichlorocyclobutanone
anti-1-[N-(tert-butoxycarbonyl)amino]-3-benzyloxymethyl-1-cyclobutane-1-carboxylic acid t-butyl ester