diexo-2-Methylamino and 2-benzylamino-3-hydroxymethylbicyclo [2.2.1]heptanes and the corresponding bicycio [2.2.1] heptenes (5a -d, 7a -d) were synthesized from β-amino acid esters containing the norbornane or norbornene skeleton (3a-d). The aminoalcohols were converted to 5,8- methano -3,1-benzoxazines by reaction with formaldehyde. As established by 1H and 13C NMR spectroscopy, the predominant conformation
由包含降冰片烷或降冰片烯骨架(3a-d)。通过与甲醛反应将氨基醇转化为5,8-甲醇-3,1-苯并恶嗪。如1 H和13 C NMR光谱所确定的,主要构象是二叉基的内-船形(B),二叉基衍生物的是外-船形(E)。