A facile and versatile synthesis of dihydrobenzoheterocycles via Al(OTf)(3)-mediated cascade cyclization and ionic hydrogenation has been developed. The reaction is applicable to a wide range of substrates with various functional groups to afford the corresponding products in good yields.
Über die Synthese von 1,4-Benzoxazepinen und ihre Umlagerung in Isochinoline
作者:K. Schenker
DOI:10.1002/hlca.19680510303
日期:1968.4.20
The syntheses of 3-phenyl-5-oxo-4, 5-dihydro-1,4-benzoxazepine (2) and -3-phenyl-5-ethoxy-1,4-benzoxazepine (14) are described. 2 rearranges under the influence of sodamide into the isoquinoline derivatives 4, 5 and 6 respectively; 14 is converted quantitatively into 1-ethoxy-3-phenyl-4-hydroxy-isoquinoline (16) in boiling methanol, even in the absence of a strong base. Possible reaction mechanisms