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2-Propen-1-one, 1-(3-chloro-2-thienyl)-3-(4-nitrophenyl)-, (2E)- structure
2-Propen-1-one, 1-(3-chloro-2-thienyl)-3-(4-nitrophenyl)-, (2E)- structure

2-Propen-1-one, 1-(3-chloro-2-thienyl)-3-(4-nitrophenyl)-, (2E)-

Iupac Name:2,4-dichloropyrimidine
CAS No.:3934-20-1
Molecular Weight:148.974
1. Names and Identifiers
1.1 Name
2-Propen-1-one, 1-(3-chloro-2-thienyl)-3-(4-nitrophenyl)-, (2E)-
1.2 CAS No.
3934-20-1
1.3 CID
77531
1.4 Molecular Formula
C20H17N3OS (isomer)
1.5 Inchi
InChI=1S/C4H2Cl2N2/c5-3-1-2-7-4(6)8-3/h1-2H
1.6 InChkey
BTTNYQZNBZNDOR-UHFFFAOYSA-N
1.7 Canonical Smiles
C1=CN=C(N=C1Cl)Cl
1.8 Isomers Smiles
C1=CN=C(N=C1Cl)Cl
2. Properties
3.1 Melting point
57-62℃
3.1 Refractive index
1.559
3.1 Precise Quality
147.96000
3.1 PSA
25.78000
3.1 logP
1.78340
3. Safety and Handling
4.1 Risk Statements
R36/37/38
4.1 Safety Statements
S26;S28
4.1 Packing Group
III
4.1 Hazard Class
8
4.1 RIDADR
1759
4.1 WGK Germany
3
4. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Skin irritation, Category 2

Eye irritation, Category 2

Specific target organ toxicity \u2013 single exposure, Category 3

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Warning

Hazard statement(s)

H315 Causes skin irritation

H319 Causes serious eye irritation

H335 May cause respiratory irritation

Precautionary statement(s)
Prevention

P264 Wash ... thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P271 Use only outdoors or in a well-ventilated area.

Response

P302+P352 IF ON SKIN: Wash with plenty of water/...

P321 Specific treatment (see ... on this label).

P332+P313 If skin irritation occurs: Get medical advice/attention.

P362+P364 Take off contaminated clothing and wash it before reuse.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P337+P313 If eye irritation persists: Get medical advice/attention.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P312 Call a POISON CENTER/doctor/\u2026if you feel unwell.

Storage

P403+P233 Store in a well-ventilated place. Keep container tightly closed.

P405 Store locked up.

Disposal

P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

5. Computational chemical data
  • Molecular Weight:148.974g/mol
  • Molecular Formula:C20H17N3OS
  • Compound Is Canonicalized:True
  • XLogP3-AA:2.1
  • Exact Mass:147.9595035
  • Monoisotopic Mass:147.9595035
  • Complexity:78.4
  • Rotatable Bond Count:0
  • Hydrogen Bond Donor Count:0
  • Hydrogen Bond Acceptor Count:2
  • Topological Polar Surface Area:25.8
  • Heavy Atom Count:8
  • Defined Atom Stereocenter Count:0
  • Undefined Atom Stereocenter Count:0
  • Defined Bond Stereocenter Count:0
  • Undefined Bond Stereocenter Count:0
  • Isotope Atom Count:0
  • Covalently-Bonded Unit Count:1
6. Question & Answer
  • I've seen many papers (see e.g. Synthesis 2010, 16, 2721–2724 ) in which the 4-chloro group of 2,4-dichloropyrimidine is selectively reacted under Suzuki coupling conditions. Is there any way where this regioselectivity of the coupling can be predicted?
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