Tetrahedron Letters p. 1311 - 1314 (1991)
Update date:2022-08-17
Topics:
Nasielski, J.
Rypens, C.
Excess piperidine and 2-chloro-7-nitroquinoxaline 1 in diethyl ether give large amounts of the unexpected disubstitution product 6-nitro-2,3-di-piperidinoquinoxaline 3.The mechanism of this very unusual nucleophilic substitution of hydrogen is suggested to involve the oxidation of the dipiperidino-dihydroquinoxaline 10 by dissolved oxygen.
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