Jeong, Hyangsoo et al. published their research in Organometallics in 2015 | CAS: 628-13-7

Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Synthetic Route of C5H6ClN

Synthesis of Molybdenum and Tungsten Alkylidene Complexes that Contain a tert-Butylimido Ligand was written by Jeong, Hyangsoo;Schrock, Richard R.;Muller, Peter. And the article was included in Organometallics in 2015.Synthetic Route of C5H6ClN This article mentions the following:

A variety of Mo or W complexes that contain a tert-butylimido ligand were prepared For example, the o-methoxybenzylidene complex W(N-t-Bu)(CH-o-MeOC6H4)(Cl)2(py) was prepared through addition of pyridinium chloride to W(N-t-Bu)2(CH2-o-MeOC6H4)2, while Mo(N-t-Bu)(CH-o-MeOC6H4)(ORF)2(t-BuNH2) complexes (ORF = OC6F5 or OC(CF3)3) were prepared through addition of two equivalent of RFOH to Mo(N-t-Bu)2(CH2-o-MeOC6H4)2. An x-ray crystallog. study of Mo(N-t-Bu)(CH-o-MeOC6H4)[OC(CF3)3]2(t-BuNH2) showed that the methoxy O is bound to the metal and that two protons on the tert-butylamine ligand are only a short distance away from one of the CF3 groups on one of the perfluoro-tert-butoxide ligands (H···F = 2.456(17) and 2.467(17) Å). Other synthesized W tert-butylimido complexes include W(N-t-Bu)(CH-o-MeOC6H4)(pyr)2(2,2′-bipyridine) (pyr = pyrrolide), W(N-t-Bu)(CH-o-MeOC6H4)(pyr)(OHMT) (OHMT = O-2,6-(mesityl)2C6H3), W(N-t-Bu)(CH-t-Bu)(OHMT)(Cl)(py) (py = pyridine), W(N-t-Bu)(CH-t-Bu)(OHMT)(Cl), W(N-t-Bu)(CH-t-Bu)(pyr)(ODFT)(py), W(N-t-Bu)(CH-t-Bu)(OHMT)2, and W(N-t-Bu)(CH-t-Bu)(ODFT)2(ODFT = O-2,6-(C6F5)2C6H3). W(N-t-Bu)(CH-t-Bu)(OHMT)2 does not react with ethylene or 2,3-dicarbomethoxynorbornadiene. Removal of pyridine from W(N-t-Bu)(CH-t-Bu)(BiphenCF3)(pyridine) (BiphenCF3 = 3,3′-di-tert-butyl-5,5′-bistrifluoromethyl-6,6′-dimethyl-1,1′-biphenyl-2,2′-diolate) with B(C6F5)3 gave a five-coordinate 14e neopentyl complex as a consequence of CH activation in one of the Me groups in one tert-Bu group of the BiphenCF3 ligand, as was proven in an x-ray study. An attempted synthesis of W(N-t-Bu)(CH-t-Bu)(BiphenMe) (BiphenMe = 3,3′-di-tert-butyl-5,5′,6,6′-tetramethyl-1,1′-biphenyl-2,2′-diolate) gave a 1:1 mixture of W(N-t-Bu)(CH-t-Bu)(BiphenMe) and a neopentyl complex analogous to the one characterized through an x-ray study. The metallacyclobutane complexes W(N-t-Bu)(C3H6)(pyrrolide)(ODFT) and W(N-t-Bu)(C3H6)(ODFT)2 were prepared in reactions involving W(N-t-Bu)(CH-t-Bu)(pyr)2(bipy), ZnCl2(dioxane), and one or two equivalent of DFTOH, resp., under 1 atm of ethylene. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Synthetic Route of C5H6ClN).

Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Synthetic Route of C5H6ClN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem