Reference of 63558-65-6 ,Some common heterocyclic compound, 63558-65-6, molecular formula is C4H2ClIN2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.
Step 3: tert-Butyl (lR)-7-chloro-l-(5-formyl-2-methyi-3-thienyl)-3,4-dihydro-lH-isoquinoline- 2-carboxylate [00994] A solution of 4-chloro-5-iodopyrimidine (27.85 g, 1 16 mmol) in THF (280 mL) was cooled to -78 C with a dry-ice/MeOH bath. To the solution was added dropwise 2.50 M of n-BuLi in hexane (93 mL, 233 mmol) and the mixture was allowed to stir for 15 min at -78 C. To the mixture was added dropwise a solution of tert-butyl (lR)-7-chloro- l-(5-formyl-2-methyl-3- thienyl)-3,4-dihydro- lH-isoquinoline-2-carboxylate (27 g, 68.5 mmol) in THF (90 mL) at -75 C, and the resulting mixture was allowed to stir for 10 min at -40C followed by stirring for 30 min at 26 C. The reaction was quenched by addition of saturated aqueous NH4C1 (560 mL) and extracted with EtOAc (600 mL x 3). The combined organic layers were washed with brine, dried over Na2S04, filtered, and concentrated in vacuo to provide 90 g of a maroon oil which was used without further purification. This step can also be done using a magnesium-halogen exchange (such as isopropylmagnesium chloride lithium chloride complex). Solvent for this transformation can alternatively comprise MeTHF. This reaction also can be run at 0 C to room temperature.The crude mixture was divided into three portions (30g, 59 mmol each) and each portion was dissolved in DCM (500 mL). Manganese (IV) oxide (86.7 g, 1 mol) was added to each solution and the reactions were allowed to stir at 30C for 4 h, at which point they were combined and filtered through a Celite pad. The filter cake was rinsed with DCM MeOH (100/1 , 500 mL x 3). The filtrate was concentrated in vacuo and the residue was purified by column chromatography eluting with 90/10 to 85/15 pentane/EtOAc gradient to provide 40 g (58% in 2 steps) of the title compound as a light yellow solid. The oxidation of tert-butyl ( l R)-7-chloro- l – (5-((4-chloropyrimidin-5-yl)(hydroxy)methyl)-2-methylthiophen-3-yl)-3,4-dihydroisoquinoline- 2(l H)-carboxylate can also be done using TEMPO/NaCIO reaction conditions. LCMS: (AA) M+Na 522.6.
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 63558-65-6, 4-Chloro-5-iodopyrimidine, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; DUFFEY, Matthew O.; ENGLAND, Dylan; FREEZE, Scott; HU, Zhigen; LANGSTON, Steven, P.; MCINTYRE, Charles; MIZUTANI, Hirotake; ONO, Koji; XU, He; (684 pag.)WO2016/4136; (2016); A1;,
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