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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

(R)-3-(tert-Butoxycarbonylamino)piperidine | CAS 309956-78-3

A 3R aminopiperidine with Boc protection on the exocyclic amino group and a free ring nitrogen, documented in linagliptin routes where these two nitrogen sites perform different synthetic roles.

CAS309956-78-3
Molecular formulaC10H20N2O2
Molecular weight200.28 g/mol

Product overview

The position of the Boc group is the defining procurement detail for this chiral piperidine. CAS 309956-78-3 describes tert-butyl N-[(3R)-piperidin-3-yl]carbamate: the amino substituent at C3 is protected, while the piperidine ring nitrogen is free. It should not be confused with a ring-N-Boc-protected 3-aminopiperidine or with a hydrochloride. Published linagliptin chemistry uses this differentiated nitrogen arrangement to connect the ring nitrogen before revealing the protected amino group. The R centre is already present in the purchased fragment. Buyers therefore need to confirm protection position, free-base form and stereochemical composition together. A short name such as 'Boc aminopiperidine' leaves too much structural information unresolved for reliable route matching.

Chemical identity

Chemical name
(R)-3-(tert-Butoxycarbonylamino)piperidine
CAS number
309956-78-3
Molecular formula
C10H20N2O2
Molecular weight
200.28 g/mol

Application context

(R)-3-Boc-aminopiperidine is used in published linagliptin synthesis. Its free ring nitrogen connects to the 8-position of a xanthine intermediate, while the exocyclic C3 amino group remains Boc-protected. Deprotection later reveals that amine. This differentiated nitrogen arrangement and the existing 3R centre define the fragment. Specify the protection position, free ring nitrogen and free-base form, with separate chemical and enantiomeric criteria.

Chemistry and synthetic role

The molecule combines a free cyclic secondary amine with an exocyclic carbamate at C3. The Boc group is on the latter nitrogen, and the substituted ring carbon is R.

Quality review

Locate Boc on the correct nitrogen

Require a complete structure or suitable spectra establishing protection of the exocyclic 3-amino group.

Verify the 3R centre

Set a chiral criterion separately from general assay or amine titration.

Keep the ring nitrogen available

Confirm the free-base identity and review relevant salt, deprotected or differently protected forms.

Preparing a specification

Specify CAS 309956-78-3, 3R configuration and exocyclic N-Boc protection with the ring nitrogen free. Define chemical assay, chiral purity and limits for agreed protection-state related substances.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, quantity and destination. Agree storage and handling conditions using the actual supplied material’s SDS and label.

Documentation

Request COA, SDS and spectra supporting the Boc location. Confirm availability of a chiral chromatogram and the method used to distinguish differently protected or deprotected material.

Procurement questions

Is the piperidine ring nitrogen Boc-protected?

No. Boc protects the exocyclic amino group at C3; the ring nitrogen is free.

Why is this distinction important for linagliptin chemistry?

The published strategy connects through the ring nitrogen before removing the amino-group protection.

Can the hydrochloride be supplied under the same identity?

A salt requires its own chemical-form specification; this entry defines the free base.

Technical sources
  1. PubChem CID 1514172: properties and CAS synonymsNCBI / NLM / NIH
  2. (R)-3-(tert-Butoxycarbonylamino)piperidine B3591Tokyo Chemical Industry
  3. CN112552299B — A preparation method of linagliptin for treating type II diabetesCNIPA patent, abstract hosted by PubChem
  4. CN105440034ACNIPA patent PDF via Google Patents