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(E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane

Also known as: E-2-(Thiophen-3-yl)vinylboronic acid pinacol ester, trans-2-(Thiophen-3-yl)vinylboronic acid pinacol ester, 4,4,5,5-Tetramethyl-2-[(1E)-2-(3-thienyl)ethenyl]-1,3,2-dioxaborolane, 4,4,5,5-Tetramethyl-2-[(E)-2-thiophen-3-ylethenyl]-1,3,2-dioxaborolane, 4,4,5,5-Tetramethyl-2-[(E)-2-thiophen-3-ylvinyl]-1,3,2-dioxaborolane

(E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane (CAS 736987-75-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H17BO2S and a molecular weight of 236.13800 g/mol. Key properties include a boiling point of 106-108ºC/0.2 mmHg and a density of 1.073 g/mL at 25ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
736987-75-0
Jingsj CID
J-1484990-2
Molecular Formula
C12H17BO2S
Molecular Weight
236.13800 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point106-108ºC/0.2 mmHg
Density1.073 g/mL at 25ºC
Exact Mass236.10400
PSA46.70000
LogP3.39270
Refractive Indexn20/D 1.5376

Customs & Trade Information

HS Code2934999090
Summary2934999090. other heterocyclic compounds. 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 (E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane?

The CAS number of (E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane is 736987-75-0.

What are the molecular formula and molecular weight of (E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane?

(E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane has molecular formula C12H17BO2S and molecular weight 236.13800 g/mol.

What are the upstream and downstream products of (E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane?

For (E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane, Upstream Products: 3-Ethynylthiophene, Bis(pinacolato)diboron, Pinacolborane.

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

Last updated:

How to cite: Jingsj. "(E)-4,4,5,5-Tetramethyl-2-(2-(thiophen-3-yl)vinyl)-1,3,2-dioxaborolane (CAS 736987-75-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1484990-2 (accessed 2026-11-09).

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