Reimer-Tiemann rearrangement

Pinacol-pinacolone rearrangement Prileschajew epoxidation reaction Reformatsky reaction Reimer-Tiemann reaction Rosemnund reduction Sandmeyer reaction Schiemann reaction Schmidt reaction or rearrangement Schotten-Baumann reaction Skraup reaction Sommelet reaction. ... 

The keto tautomers of monohydric phenols are frequently invoked as reactive intermediates in many reactions, such as the Reimer-Tiemann and Kolbe-Schmitt reactions , electrophilic substitution (e.g. bromination i) s well as the photo-Fries rearrangement (see Section IV.D and also Refs. 16-18 cited in Reference 7). In certain cases the keto... 

There are two reactions which can give unusually large amounts of ortho product the Fries rearrangement (i) (see page 22), and the Reimer-Tiemann reaction (ii) These can be used to set up ortho substituents with other substituents present but one OH group is needed in the molecule. 

An abnormal Reimer-Tiemann reaction has been observed in which dichlorocarbene attack at the 2-position to the phenolic hydroxyl group was sterically blocked resulting instead in displacement of the methoxyl group at the adjoining position (ref.8). The hexahydrodibenzfuran depicted was obtained by the Diels-Alder reaction of 2-methoxybenzo-1,4-quinone and 1-methoxy-4(2-methoxyethyl)cyclohexa-1,3-diene followed by acidic rearrangement at ambient temperature. 

Contrary to what has been conveyed by historians, AngeU and his former teacher Ciamician possessed markedly different characters and temperaments, but nonetheless Ciamician never had a more faithful disciple and staunch supporter. Angeli even argued on his behalf with the doyen of Italian chemists, Stanislao Cannizzaro (1826-1910). He also had a few contretemps with Ferdinand Tiemann (1848-99), co-discoverer of the Reimer-Tiemann reaction and with Theodor Curtius (1857-1928), discoverer of the Curtius rearrangement, diazoacetic acid, and hydrazine. All of their discussions were conducted with great respect and mutual regard. 

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