 Home > Pharmaceutical Intermediates > Bulk Drug Intermediates > (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 cas 1428243-26-8 Upadacitinib Intermediates

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

5 Inquiries

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CAS No.:

1428243-26-8

Grade:

Pharmaceutical Grade

Content:

99%

Port:

jinan

Brand:

Packaging:

bag

Price valid (until):

2026-04-24

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Jinan topfull chemical co.,ltd

Company Type:

Trader

Location:

China

Payment Terms:

TT against copy of documents,TT against B/L draft before shipment,100% TT in advance

Average Lead Time:

7 days

Qualification:

Main Products:

Medetomidine,Medetomidine hydrochloride,D-Lysergic Acid Methyl Ester,SR17018,Fluralaner,GS-441524

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Product Description
Seller Information
Inquiry History

Description

(3R,4S)-3-(2-bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid benzyl ester is a key intermediate of utpatinib.

1. Consignee name: Mr.lucas
2. Phone/what3pp：86 15053178817
3. E mail：lucas@tf-chemi.com

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.

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:
Bulk Drug Intermediates

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:
Medetomidine,Medetomidine hydrochloride,D-Lysergic Acid Methyl Ester,SR17018,Fluralaner,GS-441524

Location:
RONGSHENG BEIYUANDAJIE 9, LICHENG DISTRICT,JINAN, SHANDONG CHINA

Payment Terms:
TT against copy of documents,TT against B/L draft before shipment,100% TT in advance

Average lead Time:
7 days

Total Annual Revenue:
$1 million-$2.5 million

Total Employees:
11-50

Year of Establishment:
2022

Jinan Topfull Chemical Co., Ltd. is a global chemical Industrial and focuses on advanced chemical technology. Specialized in Cosmetic materials, water treatment, fine chemicals and so on. We are looking forward to working together with the people of all circles at home and abroad to seek common development!

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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1428243-26-8/(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester	/99	$10-12/KG FOB	Conier Chem&Pharma Limited	Inquiry
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(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester cas 1428243-26-8 Upadacitinib Intermediates

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