I. Paterson et al., STEREOCONTROLLED ALDOL ADDITIONS TO ALPHA-METHYLENE-BETA-ALKOXY ALDEHYDES - APPLICATION TO THE SYNTHESIS OF A C-13-C-25 SEGMENT OF BAFILOMYCIN A(1), Tetrahedron letters, 36(1), 1995, pp. 175-178
A boron-mediated, syn-aldol coupling between ethyl ketone 8 and aldehy
de 9, followed by directed hydrogenation at C-16 and acetonide hydroly
sis, gives the C-13-C-25 segment 6 of bafilomycin A(1).