Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Tetrahedron Letters called A practical asymmetric synthesis of carnitine, Author is Kitamura, M.; Ohkuma, T.; Takaya, H.; Noyori, R., which mentions a compound: 90866-33-4, SMILESS is O=C(OCC)C[C@@H](O)CCl, Molecular C6H11ClO3, Name: (R)-Ethyl 4-chloro-3-hydroxybutanoate.
The asym. hydrogenation of ClCH2COCH2CO2Et (I) catalyzed by Ru(OAc)2[(S)-binap] [binap = 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl] gave 97% (R)-ClCH2CH(OH)CH2CO2Et [(R)-II] with 97% enantiomeric excess. (R)-II can be converted to (R)-carnitine (III) by standard methods. The asym. hydrogenation of I catalyzed by Ru(OAc)2[(R)-binap] gave (S)-II.
From this literature《A practical asymmetric synthesis of carnitine》,we know some information about this compound(90866-33-4)Name: (R)-Ethyl 4-chloro-3-hydroxybutanoate, but this is not all information, there are many literatures related to this compound(90866-33-4).
Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem