N,N-dimethyl-formamide dimethyl acetal in chloroform Ambient temperature;

T=90 - 130°C; P=12 Torr; Stickstoff-Atmosphaere;

1: With trimethylsilyl trifluoromethanesulfonate; N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; Mukaiyama aldol addition; 2 h; Inert atmosphere; 2: With water; trifluoroacetic acid in ethanol; dichloromethane Inert atmosphere;

1: With trimethylsilyl trifluoromethanesulfonate; N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; Mukaiyama aldol addition; 2 h; Inert atmosphere; 2: With water; trifluoroacetic acid in ethanol; dichloromethane Inert atmosphere;

zinc; benzene Behandeln mit wss.-aethanol. Natronlauge;

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