Efficient One-Step Conversion of Tetrahydropyranyl Ethers into Acetates and Formates in the Presence of Potassium Dodecatungstocobaltate K5CoW12O40 · 3H2O
作者:E. Rafiee、Sh. Tangestaninejad、M. H. Habibi、I. Mohammadpoor-Baltork、V. Mirkhani
DOI:10.1007/s11178-005-0176-0
日期:2005.3
Tetrahydropyranyl ethers derived from primary alcohols were directly and efficiently converted into the corresponding acetates and formates by the action of ethyl acetate, acetic acid, acetic anhydride, and ethyl formate in the presence of a catalytic amount of potassium dodecatungstocobaltate K5CoW12O40 · 3H2O. Tetrahydropyranyl ethers derived from secondary alcohols and phenols can also be transformed into the corresponding acetates with the use of acetic anhydride, but K5CoW12O40 · 3H2O was ineffective for esterification with ethyl acetate, acetic acid, and ethyl formate.
在催化量的钴十二钨酸钾K5CoW12O40·3H2O存在下,通过乙酸乙酯、乙酸、乙酸酐和乙醇酸乙酯的作用,由伯醇衍生的四氢吡喃醚可以直接且高效地转化为相应的乙酸酯和甲酸酯。由仲醇和酚衍生的四氢吡喃醚也可以通过使用乙酸酐转化为相应的乙酸酯,但K5CoW12O40·3H2O对乙酸乙酯、乙酸和乙醇酸乙酯的酯化反应无效。