287384-12-7Relevant academic research and scientific papers
Improved access to chiral tetranaphthoazepinium-based organocatalysts using aqueous ammonia as nitrogen source
Manaprasertsak, Auraya,Tharamak, Sorachat,Schedl, Christina,Roller, Alexander,Widhalm, Michael
, (2019/11/05)
The class of 3,30-diaryl substituted tetranaphthobisazepinium bromides has found wide application as highly efficient C2-symmetrical phase-transfer catalysts (PTCs, Maruoka type catalysts). Unfortunately, the synthesis requires a lar
New, improved procedure for the synthesis of structurally diverse N-spiro C2-symmetric chiral quaternary ammonium bromides
Ooi, Takashi,Uematsu, Yukitaka,Maruoka, Keiji
, p. 4576 - 4578 (2007/10/03)
Selective, direct ortho magnesiation of (S)-2,2′bis(isopropoxycarbonyl)-1,1′-binaphthyl (6) has been achieved under mild conditions, using magnesium bis(2,2,6,6-tetramethylpiperamide) [Mg(TMP)2]. In combination with the subsequent reaction with
Design of N-spiro C2-symmetric chiral quaternary ammonium bromides as novel chiral phase-transfer catalysts: Synthesis and application to practical asymmetric synthesis of α-amino acids
Ooi, Takashi,Kameda, Minoru,Maruoka, Keiji
, p. 5139 - 5151 (2007/10/03)
A series of C2-symmetric chiral quaternary ammonium bromides 10 and 11 have been designed as a new, purely synthetic chiral phase-transfer catalyst, and readily prepared from commercially available optically pure 1,1′-bi-2-naphthol as a basic c
Optically active quarternary ammonium salt with axial chirality, method for producing thereof, and application thereof for asymmetric synthesis of α-amino acid
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Example 36, (2010/01/30)
A novel optically active quarternary ammonium salt with an axial chirality is provided. The quarternary ammonium salt can act as a phase-transfer catalyst to convert glycine derivatives into optically active α-amino acid derivatives by stereoselectively a
