Benzazete Diels—Alder addition

A similar process with Diels-Alder addition of the benzazete (95) and tetraphenylcyclone followed by extrusion of CO provides a route to pentaphenyl-l-benzazocine (96) (75JCS(P1)45). 

Diels-Alder addition of the benzazete (168) to tetraphenylcyclopentadienone (169) followed by CO loss yields the pentaphenylbenzazocine (170) (75JCS(PI)45). Intramolecular Wittig reaction of (171) gives some 3,4-dihydro-27/-benzoxocin (74JOC3038). 

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See also in sourсe #XX -- [ ]

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