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 Stereochemical control in microbial reduction. Part 5. Effect of allyl alcohol on reduction of β-keto esters by bakers’ yeast, published in 1987-04-05, which mentions a compound: 90866-33-4, Name is (R)-Ethyl 4-chloro-3-hydroxybutanoate, Molecular C6H11ClO3, SDS of cas: 90866-33-4.
The stereochem. course of the reduction of β-keto esters by bakers’ yeast was controlled by treating the reduction systems with allyl alc. Thus, the reduction of the 3-oxopentanoate gave one D-3-hydroxypentanoate in 59% enantiomeric excess, while addition of 1.0 g allyl alc./L gave the reduced D-isomer in 96% enantiomeric excess.
In addition to the literature in the link below, there is a lot of literature about this compound((R)-Ethyl 4-chloro-3-hydroxybutanoate)SDS of cas: 90866-33-4, illustrating the importance and wide applicability of this compound(90866-33-4).
Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem