Heterotricyclodecane XIX. Umlagerungen von 4,8‐disubstituierten 2,6‐Dioxa‐ und 2‐Oxa‐6‐aza‐adamantanen zu 4,10‐disubstituierten 2,7‐Dioxa‐ und 2‐Oxa‐7‐aza‐isotwistanen sowie ‐twistanen

Rearrangements of 4,8‐disubstituted 2,6‐dioxa‐ and 2‐oxa‐6‐aza‐adamantanes to 4,10‐disubstituted 2,7‐dioxa‐ and 2‐oxa‐7‐aza‐isotwistanes as well as ‐twistanes. Substitutions and rearrangements involving neighboring group participation starting from 4,8‐diiodo‐2,6‐dioxa‐ and 4,8‐diiodo‐2‐oxa‐6‐aza‐adamantanes ( 5 and 6, 12 and 48 , resp.) were studied, yielding 4,8‐disubstituted 2,6‐dioxa‐ and 2‐oxa‐6‐aza‐adamantanes ( 7, 9, 39, 42 and 13, 15, 50, 52 , resp.), 4,10‐disubstituted 2,7‐dioxa‐ and 2‐oxa‐7‐aza‐isotwistanes ( 8, 10, 41, 43 and 14, 16, 51, 53 , resp.) and corresponding‐twistanes ( 11 and 17 , resp.).