Authors Peng, XB; He, D; Sun, GN; Yu, Y; Ma, YH; Tang, SA; Dong, WL; Li, SY in AMER CHEMICAL SOC published article about in [Peng, Xin-Bang; He, Di; Yu, Yu; Ma, Ying-Hong; Tang, Sheng-An; Dong, Wei-Li; Li, Shao-Yong] Tianjin Med Univ, Sch Pharm, Tianjin 300070, Peoples R China; [Sun, Guan-Nan] Tianjin Med Univ, Gen Hosp, Tianjin 300070, Peoples R China; [Sun, Guan-Nan] Tianjin Vocat Coll Bioengn, Tianjin 300462, Peoples R China in 2021, Cited 52. Application In Synthesis of 4-Methoxybenzaldehyde. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5
In order to prepare bridging chiral p-tert-butylcalix[4]crown-5 with a mononitro bridge substituent in a 1,3-alternate conformation, a mononitration method of calix[4]arene bridging methylene has been first developed with tert-butyl nitrite as a nitration reagent. The effects of solvent, reaction temperature, reaction time, and nitration reagent dosage on bridge mononitration have been deeply explored to obtain an optimal nitration condition. The facile nitration presents a new key for calix[4]arene bridge derivatization. After further modification and diastereoisomeric resolution, a pair of bridging chiral p-tert-butylcalix[4]arenes with a monoamino bridge substituent were produced from the bridge-mono-nitrated calix[4]arene. Their preliminary catalysis results in the Henry reaction show good catalytic activities (up to 95% yield) and still low but obviously enhanced enantioselectivities (up to 22.3% ee from 7a, 6% ee from 1), which confirms that the structural transformation indeed improves asymmetric catalysis performances of bridging chiral calix[4]crown-5 amines in a 1,3-alternate conformation.
Application In Synthesis of 4-Methoxybenzaldehyde. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Peng, XB; He, D; Sun, GN; Yu, Y; Ma, YH; Tang, SA; Dong, WL; Li, SY or concate me.
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