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Heterocyclic building blocks

Tac 278

Also known as Tac-278, 5-Pyrimidinecarboxylic acid, 4-butoxy-5-fluorohexahydro-2,6-dioxo-, ethyl ester, cis-(+-)-, 5-Pyrimidinecarboxylic acid, 4-butoxy-5-fluorohexahydro-2,6-dioxo-, ethyl ester

CAS 65906-75-4Formula C11H17FN2O5Molar mass 276.26 g/mol
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Tac 278 chemical structure, C11H17FN2O5, CAS 65906-75-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
65906-75-4
Formula
C11H17FN2O5
Molar mass
276.26 g/mol
HS code
293359
Category
Heterocyclic building blocks

What is Tac 278?

Plain description, key identifiers and synonyms

Tac 278 is a chemical substance with the molecular formula C11H17FN2O5 and a molar mass of 276.26 g/mol. Its CAS registry number is 65906-75-4. The IUPAC name is ethyl 4-butoxy-5-fluoro-2,6-dioxo-1,3-diazinane-5-carboxylate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethyl 4-butoxy-5-fluoro-2,6-dioxo-1,3-diazinane-5-carboxylate
CAS number
65906-75-4 CAS number cross-checked
Molecular formula
C11H17FN2O5
InChIKey
QYIJQWZDUJULHZ-UHFFFAOYSA-N
InChI
InChI=1S/C11H17FN2O5/c1-3-5-6-19-8-11(12,9(16)18-4-2)7(15)13-10(17)14-8/h8H,3-6H2,1-2H3,(H2,13,14,15,17)
SMILES (canonical and isomeric)
CCCCOC1C(C(=O)NC(=O)N1)(C(=O)OCC)F

Synonyms

  • Tac-278
  • 5-Pyrimidinecarboxylic acid, 4-butoxy-5-fluorohexahydro-2,6-dioxo-, ethyl ester, cis-(+-)-
  • 5-Pyrimidinecarboxylic acid, 4-butoxy-5-fluorohexahydro-2,6-dioxo-, ethyl ester
  • ethyl 4-butoxy-5-fluoro-2,6-dioxohexahydropyrimidine-5-carboxylate
  • Ethyl t-butoxy-5-fluoro-hexahydro-2,4-dioxopyrimidine-5-carboxylate
  • ethyl 4-butoxy-5-fluoro-2,6-dioxo-hexahydropyrimidine-5-carboxylate
  • Ethyl 4-butoxy-5-fluoro-2,6-dioxohexahydro-5-pyrimidinecarboxylate
  • Ethyl 4-butoxy-5-fluoro-2,6-dihydroxy-4,5-dihydropyrimidine-5-carboxylate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
276.26 g/molcalc.
Exact mass
276.1122 Dacalc.
LogP (octanol/water)
0.24calc.
Topological polar surface area
93.73 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
6calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.73calc.
Formal charge
0calc.
Stereocentres
2calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1CCNC(=O)N1

O=C1CCNC(=O)N1

1 ring, 8 atoms, the Dihydrouracil ring system.

220 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Tac 278 suppliers

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Tac 278 price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Tac 278 is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Tac 278 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Tac 278, based on the data on this page

What is Tac 278?

Tac 278 is a chemical substance with the molecular formula C11H17FN2O5 and a molar mass of 276.26 g/mol. Its CAS registry number is 65906-75-4. The IUPAC name is ethyl 4-butoxy-5-fluoro-2,6-dioxo-1,3-diazinane-5-carboxylate.

What is the CAS number of Tac 278?

The CAS registry number of Tac 278 is 65906-75-4.

What is the molecular formula and weight of Tac 278?

The molecular formula of Tac 278 is C11H17FN2O5 and its molar mass is 276.26 g/mol.

What is Tac 278 used for?

Known uses and roles of Tac 278 include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Tac 278 hazardous?

No GHS hazard classification for Tac 278 is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Tac 278?

Tac 278 is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Tac 278?

Post a free request on CompoundList and suppliers of Tac 278 will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Tac 278?

Suppliers quote Tac 278 on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Tac 278

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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