Methyl 3-Hydroxythieno[2,3-b]pyridine-2-carboxylate

Methyl 3-(Quinolin-2-yl)indolizine-1-carboxylate

A novel compound, methyl 3-(quinolin-2-yl)indolizine-1-carboxylate (2) has been synthesized by cycloaddition reaction of 1-(quinolin-2-ylmethyl)pyridinium ylide (1) with methyl propiolate in presence of sodium hydride in THF. The structure of this compound was established by IR, 1H-NMR, 13C-NMR and MS data.

3-Hy­droxy­pyridinium-2-carboxylate

Comparable to many amino acids, the title compound, C(6)H(5)NO(3), is a substitution product of picolinic acid. The mol-ecule shows approximate non-crystallographic C(s) symmetry. Like many amino acids, the mol-ecule is present in its zwitterionic state. Intra- as well as inter-molecular hydrogen bonds are observed, the latter connecting the mol-ecules into zigzag chains along the crystallograp...

Cycloaddition of methyl 2-(2,6-dichorophenyl)-2H-azirine- 3-carboxylate to electron rich 2-azadienes

Acetylation of methyl 5-amino-1H-[1,2,4]triazole-3-carboxylate.

Acetylation with acetic anhydride of methyl 5-amino-1H-[1,2,4]triazole-3-carboxylate, one of the hetareneamino acids, was studied using HPLC, H NMR, FTIR and GC-MS. The compound has a significantly decreased susceptibility to acetylation compared to 5-amino-1H-[1,2,4]triazole itself. Two isomeric diacetylated products were found.

Ethyl 2-(3-chloro-2-pyridyl)-5-oxopyrazolidine-3-carboxylate

In the mol-ecule of the title compound, C(11)H(12)ClN(3)O(3), the five membered ring adopts an envelope conformation. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers.