 Home > Active Pharmaceutical Ingredients > Other Chemical Drugs > (3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester for Sale > (3R,4S)-3-(2-Bromoacetyl)-4-ethyl- 1-pyrrolidinecarboxylic acid phenylmethyl ester 1428243-26-8

(3R,4S)-3-(2-Bromoacetyl)-4-ethyl- 1-pyrrolidinecarboxylic acid phenylmethyl ester 1428243-26-8

Name: (3R,4S)-3-(2-Bromoacetyl)-4-ethyl- 1-pyrrolidinecarboxylic acid phenylmethyl ester 1428243-26-8
Brand: Zentrachem
SKU: pr2509181554
Price: 0.1 USD
Availability: InStock

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CAS No.:

1428243-26-8

Grade:

Pharmaceutical Grade

Content:

99%

Port:

Shanghai

Brand:

Zentrachem

Packaging:

25kgs in drum

Price valid (until):

2025-11-30

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Hangzhou Zentra Bio-Chemical Co., Ltd.

Company Type:

Trader

Location:

China

Payment Terms:

TT against copy of documents,D/P,L/C,D/A,100% TT in advance

Average Lead Time:

14 days

Qualification:

Main Products:

pharmaceutical intermediates,excipients,plant extracts,food additives,CDMO,fine cheimcals

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Product Description
Seller Information
Inquiry History

Description

Product Detail

samples available

we are capable of:

1) quick quotation, normally within 1-2 days

2) full marketing research

3) price control and quality(regulatory) control

4) all stage support from sample, pilot, registration and commercial

5) sourcing for prodcut which is very new or hard to find

6) CMO/CDMO, from pilot-scale development to industrial-scale manufacturing

What are the MOQ and lead time?

MOQ varies (high-value chemicals may negotiate to g-kg-level).

Lead time typically 2-4 weeks, with expedited options upon request.

How do we ensure product quality and compliance?

We enforce a 3-step protocol:

① Source only from ISO-certified suppliers;

② Provide batch-specific COA/COO;

③ Dedicated team monitors global regulations (e.g., China NECIC, EU SCIP).

Do we offer customized synthesis?

Yes!

We provide end-to-end solutions from R&D to scale-up production.

Technical specs (e.g., purity, CAS#) and intended use documentation are required.

How do we handle logistics and customs?

We support CIF/FOB/DDP/DAP terms, partner with global logistics providers,

and have in-house experts for HS code classification, hazardous material documentation, etc.

How do we manage raw material price fluctuations?

We mitigate risks via long-term contracts, multi-region sourcing,

and futures hedging, supplemented with quarterly market analysis reports.

Items Specifications

ECHEMI Editorial Reference

Benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylate is extremely sensitive to pH, and the color characteristics of benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylate vary considerably at different pH values, and it exists and exhibits a red color mainly in the form of a molten salt ion when the aqueous pH is below 2, and it exhibits a red color when the pH is in the weak acidic range. pH is in the weakly acidic range, benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylate exists in the form of a colorless methanolic pseudobasic or hemiacetal form, and as the aqueous solution progressively approaches neutrality, benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylate deprotonates to a quinone base, and may also ring-open to the chalcone form.

Certificates
Basic Info

Product Name:
(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester

Other Name:
intermediate of abt594;Upadacitinib intermediate5;Upadacitinib intermediate;(3R,4S)-3-(2-Bromoacetyl)-4-ethylpyrrolidine-1-carboxylate;(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic ac...;(3R,4S)-3-(2-bromoacetyl)-4-ethyl-1-Pyrrolidinecarbox;Upadacitinib Intermediate1;1428243-26-8

CAS No.:
1428243-26-8

Molecular Formula:
C16H20BrNO3

InChIKeys:
QEFUCTKHMXMWRF-KGLIPLIRSA-N

Molecular Weight:
354.24

Exact Mass:
353.063

Categories:
Other Chemical Drugs

Characteristics

PSA:
46.61

XLogP3:
3.1831

Density:
1.361±0.06 g/cm3(Predicted)

Boiling Point:
453.1±45.0 °C(Predicted)

PKA:
-2.91±0.60(Predicted)

Critical Temperature & Pressure:
Storage temp. 2-8°C
Seller Information

Business Type:
Trader

Main Products:
pharmaceutical intermediates,excipients,plant extracts,food additives,CDMO,fine cheimcals

Location:
Rm 301, Bld 2, Taohuahu Neighborhood Center, Hangzhou, China

Payment Terms:
TT against copy of documents,D/P,L/C,D/A,100% TT in advance

Average lead Time:
14 days

Total Employees:
5-10

Year of Establishment:
2025

Zentra Chemical, headquartered in Hangzhou, China, is aiming to be a global leader in chemical trading and integrated solutions.

Specializing in Pharmaceutical intermediates, Agrochemical intermediates, Fine chemicals, and Cosmetic ingredients, we deliver end-to-end services spanning sourcing, supply chain optimization, customized synthesis, cost management, and quality assurance.

Our mission is to empower clients worldwide with agile, sustainable, and value-driven partnerships in the ever-evolving chemical industry.

Why us

Supplier, distributor & marketer of chemicals with >20 yrs of experience, with Integrated sourcing solutions.

Wide product range , We can source any fine chemical you require, unlimited range, including intermediates and products for agrochemicals, cosmetics, APIs, nanotechnology, additives, flavors, fragrances, photography, plant extracts, electronics industries and more.

We can solve your sourcing problems through our own or third party manufacturing in the most transparent way.

We supply all stage support from sample, pilot, registration and commercial.

Through selected pre-qualified partners under exclusive arrangements, we offer Contract manufacturing and custom synthesis , Kilo to Multi-ton scale production.

Capability

with hundreds of local manufacturers(pre-qualified), we are capable of:

1) quick quotation, normally within 1-2 days;

2) full marketing research;

3) price control and quality(regulatory) control;

4) all stage support from sample, pilot, registration and commercial;

5) sourcing for prodcut which is very new or hard to find;

6) CMO/CDMO, from pilot-scale development to industrial-scale manufacturing.

Inquiry History

5 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester	1 KG	Jan 4, 2026
India	(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester	1 KG	Jan 5, 2026
India	(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester	25 KG	May 8, 2026
India	(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester	1000 KG	May 3, 2026
India	Benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethylpyrrolidine-1-carboxylate	5 KG	May 19, 2025

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(3R,4S)-3-(2-Bromoacetyl)-4-ethyl- 1-pyrrolidinecarboxylic acid phenylmethyl ester 1428243-26-8

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