Daunos amine synthesis

Scheme 13) although it was only Isolated in 0% yield (c.f., lower selectivity attained with similar reactions earlier G.Guanti et al., Tetrahedron Lett. 1985, 3517). Ester (50) was converted to lactone (53), a known intermediate for the synthesis of L-daunos-amine and L-vancosamine (Vol.18, p.9il). The cis-3, l-dihydroxy-... 

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