29655-79-6

(Carboxymethyl)oxamic Acid Diethyl Ester, is an intermediate in various chemical synthesis. It is used in the preparation of 5-alkoxyoxazoles, used in Diels-Alder process.

Example 2 II: Compound 4 was prepared using ethyl glycinate hydrochloride and ethyl oxalyl chloride monoethyl ester as starting materials with reference to the literature (J. Heterocycl. Chem. 1995, 32, 1693-1702).Subsequently, the reduction reaction was carried out using the NaBH4/LiCl system in ethanol solution. Further oxidation by Dess-Martin oxidizer gave the target aldehyde 6 in 25% overall yield (two-step reaction).

[1] Synthetic Communications, 2000, vol. 30, # 17, p. 3171 - 3180
[2] Patent: WO2007/124546, 2007, A1. Location in patent: Page/Page column 63
[3] Chemische Berichte, 1897, vol. 30, p. 590
[4] Journal of the American Chemical Society, 1997, vol. 119, # 1, p. 86 - 93
[5] Organic Process Research and Development, 2004, vol. 8, # 2, p. 192 - 200