- Stable carbamate pathway towards organic-inorganic hybrid perovskites and aromatic imines
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Methyl ammonium methyl carbamate (MAC), formulated as CH3NH3+CH3NHCO2-, was synthesized by reacting liquid methylamine with supercritical CO2, and its structure was refined by single-crystal X-ray diffraction. MAC is a white crystalline salt and is as reactive as methylamine, and is a very efficient alternative to toxic methylamine. We were able to produce hybrid perovskite MAPbI3 (MA = methyl ammonium) by grinding MAC with PbI2 and I2 at room temperature, followed by storing the mixed powder. Moreover, this one-pot method is easily scalable for the large-scale synthesis of MAPbI3 in a small vessel. We have also investigated the reactivity of MAC towards aromatic aldehydes in the absence of solvent. The solventless reactions afforded imines as exclusive products with over 97% yield, which show higher selectivity than the methylamine-based synthesis. Complete conversions were typically accomplished within 3 h at 25 °C. The results of this study emphasize the importance of solid carbamates such as MAC to develop an environmentally friendly process for the synthesis of various amine-based materials on the industrial scale.
- Hur, Nam Hwi,Kim, Sun Joo,Lee, Byeongno,Lee, Kyu Hyung,Lim, Byung Wook,Nam, Wonwoo,Park, Hee Sun,Park, Young Jun
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p. 38055 - 38062
(2020/11/02)
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- Aryne-Mediated [2,3]-Sigmatropic Rearrangement of Tertiary Allylic Amines
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A new strategy has been established for the [2,3]-sigmatropic rearrangement of quaternary allylic ammonium ylides via in situ activation of tertiary allylic amines with arynes under mild conditions. Using 2-(trimethylsilyl)aryl triflates as aryne precurso
- Zhang, Juan,Chen, Zhi-Xiong,Du, Ting,Li, Bing,Gu, Yonghong,Tian, Shi-Kai
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supporting information
p. 4872 - 4875
(2016/10/18)
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- Efficient synthesis of N-Substituted 4-arylquinoline derivatives using ZnCl2 or ZrO2
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N-Substituted 7,8-dihydro-7,7-dimethyl-4-arylquinolin-5(1H,4H,6H)-ones 4a-l have been reported by one-pot reaction of cinnamaldehyde derivatives, dimedone and various amines in the presence of ZnCl2 or ZrO2 in fairly high yields.
- Zonouzi, Afsaneh,Mirzazadeh, Roghieh,Peivandi, Azadeh,Dehdari, Shahrzad
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experimental part
p. 1447 - 1455
(2012/08/07)
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- SUBSTITUTED PYRROLIDINE-2-ONES
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The invention relates to compounds of formula (I) wherein R1, R2, R3, R4 and n are as defined in the specification, to processes for their manufacture, to their use as pharmaceuticals, in diagnosis, as PET ligan
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Page/Page column 39
(2010/02/15)
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- The Reaction of α,β-Unsaturated Aldimines with Benzofuroxan
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Benzofuroxan reacts with imines derived from crotonaldehyde and cinnamaldehyde, to form 2-iminomethylquinoxaline 1,4-dioxides.
- Devi, Purabi,Sandhu, Jagir S.
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p. 427 - 428
(2007/10/02)
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