Abstract
A sequential, iterative synthesis of oligo-1,4-diol building blocks has been realized
via (a) propargylation of an aldehyde with allenylzinc bromide, (b) alcohol protection
and (c) ruthenium-catalyzed anti-Markovnikov hydration of the terminal alkyne to release
an aldehyde for the next iteration. Linear chains with 1,4-, 1,4,7- 1,4,7,10- and
1,4,7,10,13- functionalization patterns have been obtained by consecutive sequential
iterations.
Key words
addition reactions - aldehydes - alkynes - homogeneous catalysis - ruthenium