1291065-78-5Relevant academic research and scientific papers
Catalytic Asymmetric Diels-Alder Reaction of Quinone Imine Ketals: A Site-Divergent Approach
Hashimoto, Takuya,Nakatsu, Hiroki,Maruoka, Keiji
supporting information, p. 4617 - 4621 (2015/04/14)
The catalytic asymmetric Diels-Alder reaction of quinone imine ketals with diene carbamates catalyzed by axially chiral dicarboxylic acids is reported herein. A variety of primary and secondary alkyl-substituted quinone derivatives which have not been applied in previous asymmetric quinone Diels-Alder reactions could be employed using this method. More importantly, we succeeded in developing a strategy to divert the reaction site in unsymmetrical 3-alkyl quinone imine ketals from the inherently favored unsubstituted C=C bond to the disfavored alkyl-substituted C=C bond.
One-pot synthesis of α-amino acids from CO2 using a bismetal reagent with Si-B bond
Mita, Tsuyoshi,Chen, Jianyang,Sugawara, Masumi,Sato, Yoshihiro
supporting information, p. 6202 - 6205 (2013/02/23)
In the presence of 1.1 equiv of PhMe2Si-Bpin, 5 equiv of CsF, and 20 mol % of TsOH·H2O, precursors of N-Boc-imines can be converted into the corresponding α-aryl or α-alkenyl glycine derivatives under gaseous CO2 in moderate-to-high yields with a single operation. α-Isobutenyl glycine thus obtained can be further derivatized into various types of α-amino acids including N-Boc-leucine, serine, and glycine derivatives in short steps.
