Scharinger, Fabian;Palvolgyi, Adam Mark;Weisz, Melanie;Weil, Matthias;Stanetty, Christian;Schnuerch, Michael;Bica-Schroder, Katharina published 《Sterically Demanding Flexible Phosphoric Acids for Constructing Efficient and Multi-Purpose Asymmetric Organocatalysts》. The research results were published in《Angewandte Chemie, International Edition》 in 2022.SDS of cas: 119-47-1 The article conveys some information:
A novel approach for various asym. transformations of cyclic enones, e.g., 2-cyclohepten-1-one has been described. The combination of readily accessible chiral diamines and sterically demanding flexible phosphoric acids resulted in a simple and highly tunable catalyst framework. The careful optimization of the catalyst components led to the identification of a particularly powerful and multi-purpose organocatalyst, which was successfully applied for asym. epoxidations, aziridinations, aza-Michael-initiated cyclizations, as well as for a novel Robinson-like Michael-initiated ring closure/aldol cyclization. High catalytic activities and excellent stereocontrol were observed for all four reaction types, indicating the excellent versatility of the catalytic system. Furthermore, a simple change in the diamine’s configuration provided easy access to both product antipodes in all cases. The experimental procedure involved many compounds, such as 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) .
SDS of cas: 119-47-12,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .
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