sulfuric acid

1: (i) benzene, (ii) Zn, MeOH 2: (i) O3, MeOH, (ii) H2, Pd-CaCO3 View Scheme

nitrosyl sulfuric acid; sulfuric acid Behandlung des 2,5-Dioximino-adipinsaeure-dimethylesters mit Nitrosylschwefelsaeure in Ameisensaeure und Aether unterhalb 0grad.; diketone-form, 2,5-dioxo-adipic acid dimethyl ester;

(i) O3, MeOH, (ii) H2, Pd-CaCO3; Multistep reaction;

1: (i) NBS, CCl4, (ii) quinoline 2: (i) O3, MeOH, (ii) H2, Pd-CaCO3 View Scheme

Oxidation; diketone-form, 2,5-dioxo-adipic acid dimethyl ester;