New discoveries in chemical research and development in 2021. Chemical research careers are more diverse than they might first appear, as there are many different reasons to conduct research and many possible environments. In a patent, 86028-91-3, name is (R)-Ethyl thiazolidine-4-carboxylate hydrochloride, introducing its new discovery. Related Products of 86028-91-3
Certain new phosphonoalkanoylamino acids of the formula (I) herein and their pharmaceutically acceptable salts exhibit improved antihypertensive properties and are parti-cularly useful for the reduction of angiotensin related hypertension. in which R? and R?, which are the same or different, are each selected from the group consisting of a hydrogen atom, an optionally substituted lower alkyl, a lower alkenyl, an optionally substituted aryl and an optionally substituted aralkyl radical; n is 0 or 1; R? is a hydrogen atom, an optionally substituted lower alkyl, a lower alkenyl, an optionally substituted aryl or an optional-ly substituted aralkyl group; and (a) R? is a hydrogen atom, a lower alkyl or a phenyl-lower alkyl radical; R? and R?, which are the same or different, are each selected from the group consisting of a hydrogen atom, an optionally substituted lower alkyl or an aryl radical; and R? is selected from the group consisting of-OR?,-NR? or-SR??, wherein R? and R?? are each selected from the group consisting of a hydrogen atom, a lower alkyl, an optionally substituted aryl, or an optionally substituted aralkyl radical and R? is a hydrogen atom, a hydroxy or lower alkyl radical or the residue of an-amino acid; or (b) R? and R? are part of a four-, five-or six-membered optionally substituted heterocyclic ring as a connected bridge of 2 to 4 atoms of carbon or carbon and either nitrogen, sulphur or oxygen; and R? and R? are each as defined in (a); with the proviso that when R? is a hydrogen atom, n is 0, the heterocyclic ring is an unsubstituted pyrrolidine, R? is a hydrogen atom, and R? is OR?, at least one of R?, R? and R? is an optionally substituted aryl radical; or (c) R? and R? are selected to form a side chain of alpha-amino acid, where N(R?) CR?R?COR? is an alpha-amino acid residue; with the proviso that (i) when R? is hydrogen and n is 0, the
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Reference：
Quinuclidine – Wikipedia,
Quinuclidine | C7H786N | ChemSpider