Related Products of 869494-16-6,Some common heterocyclic compound, 869494-16-6, name is tert-Butyl 3,6-diazabicyclo[3.1.1]heptane-6-carboxylate, molecular formula is C10H18N2O2, 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.
Under inert atmosphere (N2(g)), a mechanically stirred suspension of 3,6-diaza-bicyclo[3.1.1]heptane-6-carboxylic acid tert-butyl ester (49.3 g, 249 mmol) in DMSO (200 mL) was treated with 4-(6-fluoropyridin-3 -yl)-6-(2-hydroxy-2-methylpropoxy)pyrazolo[ 1,5- a]pyridine-3-carbonitrile (Intermediate P42; 58 g, 178 mmol), and DIEA (93.1 mL, 533 mmol) was stirred 42 h at 90 C. After cooling to ambient temperature, the reaction mixture was poured into ice water (2 L). The aqueous mixture was stirred for 15 mm before Heptane (1 L) was added. The biphasic mixture was stirred vigorously for 2 h. The resulting biphasic suspension was vacuum filtered and the solids were rinsed sequentially with water (3 x 200 mL) and heptane (3 x 200 mL) to afford a product mixture containing 5-20% of the title compound, tert-butyl 6-(5-(3- cyano-6-(2-hydroxy-2-methylpropoxy)pyrazolo[ 1,5 -a]pyridin-4-yl)pyridin-2-yl)-3 , 6- diazabicyclo[3. 1.1 ]heptane-3 -carboxylate, along with the regioi somer, tert-butyl 3 -(5 -(3 -cyano-6- (2-hydroxy-2-methylpropoxy)pyrazolo[ 1,5 -a]pyridin-4-yl)pyridin-2-yl)-3 ,6- diazabicyclo[3. 1.1 ]heptane-6-carboxylate (Intermediate P43, step 1) (92 g, quantitative yield). The regioisomeric mixture was carried into Step 2 without separating (note: 3,6-diaza- bicyclo[3.1. 1 ]heptane-6-carboxylic acid tert-butyl ester can partially isomerize to the regioisomer, 3, 6-diaza-bicyclo[3. 1.1 ]heptane-3 -carboxylic acid tert-butyl ester, under these reaction conditions.) MS (apci) m/z = 505.3 (M+H).
The synthetic route of 869494-16-6 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; ANDREWS, Steven W.; ARONOW, Sean; BLAKE, James F.; BRANDHUBER, Barbara J.; COOK, Adam; HAAS, Julia; JIANG, Yutong; KOLAKOWSKI, Gabrielle R.; MCFADDIN, Elizabeth A.; MCKENNEY, Megan L.; MCNULTY, Oren T.; METCALF, Andrew T.; MORENO, David A.; TANG, Tony P.; REN, Li; (668 pag.)WO2018/71447; (2018); A1;,
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