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Protected and unnatural amino acids

Boc-Pyr-OtBu

Also known as 1,2-Bis(1,1-dimethylethyl) (2S)-1,2-pyrrolidinedicarboxylate, Boc-L-PyroglutamicAcidTert-ButylEster, N-BOC-Proline tert-Butyl Ester

CAS 91237-84-2Formula C14H25NO4Molar mass 271.36 g/mol
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Boc-Pyr-OtBu chemical structure, C14H25NO4, CAS 91237-84-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
91237-84-2
Formula
C14H25NO4
Molar mass
271.36 g/mol
HS code
293399
Category
Protected and unnatural amino acids

What is Boc-Pyr-OtBu?

Plain description, key identifiers and synonyms

Boc-Pyr-OtBu is a chemical substance with the molecular formula C14H25NO4 and a molar mass of 271.36 g/mol. Its CAS registry number is 91237-84-2. The IUPAC name is ditert-butyl (2S)-pyrrolidine-1,2-dicarboxylate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ditert-butyl (2S)-pyrrolidine-1,2-dicarboxylate
CAS number
91237-84-2
Molecular formula
C14H25NO4
InChIKey
UMCYLERMBHATJC-JTQLQIEISA-N
InChI
InChI=1S/C14H25NO4/c1-13(2,3)18-11(16)10-8-7-9-15(10)12(17)19-14(4,5)6/h10H,7-9H2,1-6H3/t10-/m0/s1
SMILES
CC(C)(C)OC(=O)[C@@H]1CCCN1C(=O)OC(C)(C)C

Synonyms

  • 1,2-Bis(1,1-dimethylethyl) (2S)-1,2-pyrrolidinedicarboxylate
  • Boc-L-PyroglutamicAcidTert-ButylEster
  • N-BOC-Proline tert-Butyl Ester
  • (S)-Di-tert-butyl pyrrolidine-1,2-dicarboxylate
  • di-tert-butyl (S)-pyrrolidine-1,2-dicarboxylate
  • tert-butyl (2S)-2-[(tert-butyl)oxycarbonyl]pyrrolidinecarboxylate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
271.36 g/molcalc.
Exact mass
271.1784 Dacalc.
LogP (octanol/water)
2.73calc.
Topological polar surface area
55.84 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
1calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.86calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1CCNC1

C1CCNC1

1 ring, 5 atoms, the Pyrrolidine ring system.

22,348 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Boc-Pyr-OtBu suppliers

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Boc-Pyr-OtBu price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Boc-Pyr-OtBu is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Boc-Pyr-OtBu is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Boc-Pyr-OtBu, based on the data on this page

What is Boc-Pyr-OtBu?

Boc-Pyr-OtBu is a chemical substance with the molecular formula C14H25NO4 and a molar mass of 271.36 g/mol. Its CAS registry number is 91237-84-2. The IUPAC name is ditert-butyl (2S)-pyrrolidine-1,2-dicarboxylate.

What is the CAS number of Boc-Pyr-OtBu?

The CAS registry number of Boc-Pyr-OtBu is 91237-84-2.

What is the molecular formula and weight of Boc-Pyr-OtBu?

The molecular formula of Boc-Pyr-OtBu is C14H25NO4 and its molar mass is 271.36 g/mol.

What is Boc-Pyr-OtBu used for?

Known uses and roles of Boc-Pyr-OtBu include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Boc-Pyr-OtBu hazardous?

No GHS hazard classification for Boc-Pyr-OtBu is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Boc-Pyr-OtBu?

Boc-Pyr-OtBu is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Boc-Pyr-OtBu?

Post a free request on CompoundList and suppliers of Boc-Pyr-OtBu will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Boc-Pyr-OtBu?

Suppliers quote Boc-Pyr-OtBu on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Boc-Pyr-OtBu

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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