dihydrogen peroxide; acetic acid anfangs unter Kuehlung, zuletzt auf dem Dampfbad;

1: dihydrogen peroxide / 2,2,2-trifluoroethanol; water / 0 - 20 °C 2: (1S,2S,4S,5R)-1-(anthracen-9-ylmethyl)-2-((R)-hydroxy(quinolin-4-yl)methyl)-5-vinyl-1-azoniabicyclo[2.2.2]octane chloride; sodium hydroxide / dichloromethane; water; toluene / 0 °C / Inert atmosphere View Scheme

hydrogenchloride Heating;

3,4-dihydroxy-3-cyclobutene-1,2-dione in water T=20°C; Michael addition; 2.5 h;

1: bis(4-methylphenyl)-disulfide With bis(cyclopentadienyl)titanium dichloride; zinc in tetrahydrofuran T=20°C; Inert atmosphere; 2: acrylonitrile in tetrahydrofuran T=20°C; 5 h; Inert atmosphere;

sodium hydroxide; water T=30 - 42°C;