期刊
TETRAHEDRON LETTERS
卷 46, 期 48, 页码 8319-8323出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2005.09.168
关键词
dimethyl acetals; diethyl acetals; aldehydes; ketones; copper(II) tetrafluoroborate hydrate; catalyst; trimethyl orthoformate; triethyl orthoformate
Commercially available copper(II) tetrafluoroborate hydrate has been found to be a highly efficient catalyst for dimethyl/ diethyl acetal formation in high yields from aldehydes and ketones by reaction with trimethyl/triethyl orthoformate at room temperature and in short period. Acetalisation was carried out under solvent-free conditions with electrophilic aldehydes/ketones. For weakly electrophilic aldehydes/ketones (e.g., benzaldehyde, cinnamaldehyde and acetophenone) and for aldehydes having a substituent that can coordinate with the catalyst, the corresponding alcohol was used as solvent. (c) 2005 Elsevier Ltd. All rights reserved.
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