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CAS No. : | 402960-38-7 | MDL No. : | MFCD06795685 |
Formula : | C10H16BN3O2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | BPQVMIDUTRJYSC-UHFFFAOYSA-N |
M.W : | 221.06 | Pubchem ID : | 17750212 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
10 mg | With bis-triphenylphosphine-palladium(II) chloride In acetonitrile | The Suzuki-type coupling reaction is useful to attach a monocyclic heteroaryl at the 2-position of the pyrimidine ring (see Scheme 4). Generally, substituted 2-chloro-4-morpholinothieno[3,2-d]pyrimidine 5 or substituted 2-chloro-4-morpholinothieno[2,3-d]pyrimidine 6 may be combined with 1.5 equivalents of 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-amine 7a, and dissolved in 3 equivalents of sodium or potassium carbonate as a 1 molar solution in water and an equal volume of acetonitrile. A catalytic amount, or more, of a low valent palladium reagent, such as bis(triphenylphosphine)palladium(II) dichloride, is added. A variety of boronic acids or boronic esters can be used in place of the pinacol boronic ester indicated. Also alternatively, the nitrogen of the pyrimidin-2-amine may be protected, for example with a tetrahydropyranyl group. In some cases potassium acetate was used in place of sodium carbonate to adjust the pH of the aqueous layer. The reaction was then heated, for example to about 100-150° C. under pressure in a Biotage Optimizer microwave reactor (Biotage, Inc.) for 10 to 30 minutes. The contents are extracted with ethyl acetate, or another organic solvent. After evaporation of the organic layer the product, 8a or 9a, may be purified on silica or by reverse phase HPLC. (S)-1-(4-((2-Chloro-7-methyl-4-morpholinothieno[3,2-d]pyrimidin-6-yl)methyl)piperazin-1-yl)-2-hydroxypropan-1-one (60 mg) was reacted with 50 mg of 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-amine via General Procedure A-2 to give 10 mg of Formula Ib (WO 2008/070740, incorporated by reference). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
27% | With caesium carbonate In 1,2-dimethoxyethane; water at 140℃; for 0.333333 h; Microwave irradiation; Inert atmosphere | Step 3: 2-Chloro-6,6-dimethyl-4-morpholino-8,9-dihydro-6H-[l,4]oxazino[3,4- e]purine (180 mg, 0.56 mmol) in 1 ,2-dimethoxyethane (5.1 mL) was added 5-(4,4,5,5- tetramethyl-l,3,2-dioxaborolan-2-yl)pyrimidin-2-amine 25 (180 mg, 0.83 mmol) and 1.0 M of cesium carbonate in water (1.7 mL). The reaction mixture was degassed for 5 min and recycled with nitrogen atmosphere. Subsequently, l, -bis(diphenylphosphino)ferrocenepalladium(II) chloride (54 mg, 0.067 mmol) was added, and the mixture was degassed and recycled again. The reaction vial was then subjected to microwave irradiation for 20 mins at 140 °C. Solid precipitate that formed during the reaction was filtered and rinsed with excess water. The precipitate was taken up in DCM and purified by FCC (40 g, 0.5-4percent MeOH in DCM, slow gradient) to isolate103 as a tan powder (56 mg, 27percent yield). MS (ESI+): m/z 383.1 (M+H+). 1H NMR (400 MHz, DMSO) δ 9.09 (s, 2H), 7.00 (s, 2H), 4.23 (m, 4H), 4.13 (m, 4H), 3.79 - 3.68 (m, 4H), 2.50 (s, 6H) |
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