In an attempt to form 2-alkylidene-1,3-oxazolidines, chiral 2-oxazolines have been N-alkylated and N-acylated. Two new N-methyloxazolinium salts have been prepared and characterized, but alkaline treatment resulted in their decomposition. In contrast, attempts to isolate three N-benzoyloxazolinium salts gave the products of their ring hydrolysis: unsymmetrically diacylated amino alcohols whose structure was confirmed by X-ray diffraction in one case. Overall the method allows stepwise regiospecific N,O-diacylation of 2-amino alcohols.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, 2020, 56(5), 611–614
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Aitken, R.A., Slawin, A.M.Z. & Wilson, A. Generation and hydrolysis of N-acyloxazolinium salts allowing regiospecific acylation of chiral amino alcohols. Chem Heterocycl Comp 56, 611–614 (2020). https://doi.org/10.1007/s10593-020-02707-3
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DOI: https://doi.org/10.1007/s10593-020-02707-3