| 词条 | Meyers synthesis |
| 释义 |
The Meyers synthesis is an organic synthesis for the preparation of unsymmetrical aldehydes via hydrolysis of an oxazine.[1][2][3][4] The reaction is named after the American chemist Albert Meyers. The starting compound is a dihydro-1,3-oxazine with an alkyl group in the 2 position. The alpha proton is acidic and can be abstracted by a strong base such as butyl lithium and subsequently alkylated by an alkyl halide (haloalkane). In the next step the nitrogen to carbon double bond (imine) is reduced with sodium borohydride and the resulting oxazine (a hemiaminal) hydrolyzed with water and oxalic acid to the aldehyde. References1. ^Aldehydes from dihydro-1,3-oxazines. I. Synthesis of aliphatic aldehydes and their C-1 deuterated derivatives Albert I. Meyers, Aiko Nabeya, H. Wayne Adickes, Ieva R. Politzer J. Am. Chem. Soc. 1969; 91(3); 763-764. {{DOI|10.1021/ja01031a053}} 2. ^Aldehydes from dihydro-1,3-oxazines. II. Synthesis of .alpha.,.beta.-unsaturated aldehydes and their C-1 deuterated derivatives Albert I. Meyers, Aiko Nabeya, H. Wayne Adickes, J. Michael Fitzpatrick, G. Ray Malone, and Ieva R. Politzer pp 764 - 765; J. Am. Chem. Soc. 1969 {{DOI|10.1021/ja01031a054}} 3. ^Aldehydes from dihydro-1,3-oxazines. III. Synthesis of cycloalkanecarboxaldehydes Albert I. Meyers, H. Wayne Adickes, Ieva R. Politzer, and Warren N. Beverung pp 765 - 767; J. Am. Chem. Soc. 1969 {{DOI|10.1021/ja01031a055}} 4. ^Organic Syntheses, Coll. Vol. 6, p.905 (1988); Vol. 51, p.24 (1971). http://www.orgsynth.org/orgsyn/pdfs/CV6P0905.pdf 2 : Organic reactions|Name reactions |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。