In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Total synthesis of (2R,4S,2’S,3’R)-hydroxyitraconazole: implementations of a recycle protocol and a mild and safe phase-transfer reagent for preparation of the key chiral units, published in 2003-11-14, which mentions a compound: 67914-60-7, Name is 1-(4-(4-Hydroxyphenyl)piperazin-1-yl)ethanone, Molecular C12H16N2O2, Recommanded Product: 67914-60-7.
A convergent total synthesis of enantiomerically-pure (2R,4S,2’S,3’R)-hydroxyitraconazole is described. The left dioxolane portion of the mol. was prepared in good yield by the conversion of (4S)-2,2-dimethyl-1,3-dioxolane-4-methanol to the corresponding enantiomerically and diastereomerically-pure acetonide (2R,4R)-2-(2,4-dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolane-4-methanol by a recycle protocol involving diastereoselective crystallization of the tosylate salt, followed by re-equilibration of the mother liquor and crystallization The right-hand triazolone moiety was generated by alkylation of a triazolone derivative with an enantiomerically pure cyclic sulfate [(4R,5R)-4,5-dimethyl-1,2,3-dioxathiolane 2,2-dioxide] under mild and essentially non-hazardous reaction conditions (TDA-1, K2CO3, acetonitrile).
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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem