Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A convergent synthesis of the spiroketal subunit of rutamycins A and B has been devised via Julia coupling of sulfone 14 with aldehyde 23; the pentahydroxy ketone 3 derived from 25 underwent spontaneous cyclization to spiroketal 4. ... Julia coupling of sulfone 14 with aldehyde 23 ...