ChemInform Abstract: STEREOSPECIFIC CONVERSION OF ALKENYLBORONIC ACIDS INTO ALKENYL BROMIDES WITH INVERSION OF CONFIGURATION, DIFFERENCES IN STEREOCHEMISTRY OF REPLACEMENT OF BORONIC ACID SUBSTITUENT BY BR AND J, REACTION MECHANISM
Abstract:Die Behandlung der nach bekannten Methoden aus dem entsprechenden Alkin dargestellten trans‐Alkenyl‐boronsäure (Ia) (R2, R3 : H) bei ‐20°C oder deren Ester (Ia) (R2 und R3: m‐Phenylen) bei 0°C mit Brom in Methylenchlorid und nachfolgende Reaktion mit Na‐methylat in Methanol liefert das Bromid (IIa).
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