1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid

Also known as: Boc-5,5-dimethyl-DL-Pro-OH, 1-Boc-5,5-dimethylpyrrolidine-2-carboxylic acid, 5,5-Dimethyl-1-{[(2-methyl-2-propanyl)oxy]carbonyl}proline, 5,5-dimethyl-1-[(2-methylpropan-2-yl)oxy-oxomethyl]-2-pyrrolidinecarboxylic acid, 5,5-dimethyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidine-2-carboxylic acid, N-Boc-5,5-dimethyl-DL-proline, 1,2-Pyrrolidinedicarboxylic acid, 5,5-dimethyl-, 1-(1,1-dimethylethyl) ester

1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid (CAS 900158-99-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H21NO4 and a molecular weight of 243.299 g/mol. Key properties include a boiling point of 345.1±35.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 162.5±25.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 900158-99-8
Jingsj CID: J-1042328-6
Molecular Formula: C₁₂H₂₁NO₄
Molecular Weight: 243.299 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	345.1±35.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	162.5±25.9 °C
Exact Mass	243.147064
PSA	66.84000
LogP	1.59
Vapor Pressure	0.0±1.6 mmHg at 25°C
Refractive Index	1.484

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid?

The CAS number of 1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid is 900158-99-8.

What are the molecular formula and molecular weight of 1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid?

1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid has molecular formula C12H21NO4 and molecular weight 243.299 g/mol.

What are the upstream and downstream products of 1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid?

For 1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid, Upstream Products: Di-tert-butyl dicarbonate, 5,5-dimethylpyrrolidine-2-carboxylic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-(tert-Butoxycarbonyl)-5,5-dimethylpyrrolidine-2-carboxylic acid (CAS 900158-99-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1042328-6 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.