The hetero Diels-Alder adducts 6a-d derived from azodibenzoyl and cyclic dienes were oxidized by ruthenium tetroxide and transformed into meso-diaminodicarboxylic acids 12a-d via the new cyclic hydrazoacetic acids 9a-d.
由偶氮二苯甲酰和环二烯衍生的异构Diels-Alder加成物6a-d被
四氧化钌氧化,并通过新的环
肼乙酸9a-d转化为美克-二
氨基二
羧酸12a-d。