Lindsay-Scott, Peter J.; Rivlin-Derrick, Eloise published the article 《Regiocontrolled Synthesis of 6,7-Dihydro-4H-pyrazolo[5,1-c][1,4]oxazines》. Keywords: dihydropyrazolooxazine regioselective preparation.They researched the compound: 2-(2-Bromoethoxy)tetrahydro-2H-pyran( cas:17739-45-6 ).Reference of 2-(2-Bromoethoxy)tetrahydro-2H-pyran. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:17739-45-6) here.
Synthesis of 6,7-dihydro-4H-pyrazolo[5,1- c][1,4]oxazines wad achieved in 3-4 steps from com. available pyrazoles. Optimization of a protected hydroxyethyl group on N1 enabled the regiocontrolled construction of pyrazole-5-aldehydes in high yields; subsequent deprotection and reduction generated fused heterocyclic scaffolds bearing multiple substitution patterns. Moreover, the intermediate pyrazole lactols were showed to be versatile synthetic building blocks.
There is still a lot of research devoted to this compound(SMILES：BrCCOC1CCCCO1)Reference of 2-(2-Bromoethoxy)tetrahydro-2H-pyran, and with the development of science, more effects of this compound(17739-45-6) can be discovered.
Reference:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem