Darstellung und Acylierung cyclischer N.N′‐Dihydroxyaminale

Abstract

2.3-Bis( hydroxy1amino)-2.3-dimethyl-but an ( 1) bildet mit Aldehyde n 1.3-Dih y drox y -imidazolidine (2,3), die sich ohne Spaltung der Aminal-Struktur an beiden Hydroxylgruppen acylieren lassen. Cyclic N.N'-Dihydroxyaminals*) Reactions of 2.3-bis(hydroxylamino)-2.3-dimethyl-butane (1) with aldehydes yield 1.3-di-hydroxy-imidazolidines (2,3) which undergo acylation of the hydroxyl groups without deavage of the aminal-structure.

2‐Amino‐1,4‐naphthochinone und 4‐Amino‐1,2‐naphthochinone als Nucleophile ‐ ein Vergleich

“…); 6.38 -'H-NMR (DMSO-d& 6 (ppm) = 9.2-8.8 (s, br, IH, N' H, aust. ); 5H,5,6,7,NH,aust. ) -[(2-Amino-l,4-dihydro-l,4-dioxo-naphth-3-yl)-merhyl]-piperidiniumperchlorar (9. ( [ (I .4-Dihydro-l,4-dioxo-2-phenylamino-naphrh-3-yl) 8.13-7.78 (m; 4H, 5.6.7.8-H); 7.45-7.21 (DMSO-d6): 6 (pprn) = 182.54 (s; C-4); 181.11 (s; C-lh 148.39 (s; C-2); 139.94 (s; C-1'); 134.76 (d; C-naphthyl); 133.13, 132.04 (s; C-4a C-8a); 131.…”