17015-60-0Relevant articles and documents
Enantioselective Synthesis of Quaternary Stereocenters via Chromium Catalysis
Xiong, Yang,Zhang, Guozhu
supporting information, p. 5094 - 5097 (2016/10/14)
Asymmetric allylation of aldehydes with γ-disubstituted allyl halides has been achieved in the presence of a sulfonamide/oxazoline chromium complex. A variety of synthetically useful α-homoallylic alcohols with two consecutive stereogenic centers, including one quaternary carbon, can be accessed in a highly diastereoselective and enantioselective manner.
A short synthesis of (+)-bakuchiol
Esumi, Tomoyuki,Yamamoto, Chihiro,Fukuyama, Yoshiyasu
, p. 1845 - 1847 (2013/09/12)
The concise enantioselective total synthesis of (+)-bakuchiol has been achieved using an asymmetric 1,4-addition to construct its all-carbon chiral quaternary center based on the induction of chirality by the (2′S)-2′-phenyloxazolidinone auxiliary, followed by a one-pot transformation under aldol reaction conditions. The synthesis was completed in four steps from (E)-geranic acid in an overall yield of 53%. Georg Thieme Verlag Stuttgart · New York.
Asymmetric construction of all-carbon quaternary stereocenters by chiral-auxiliary-mediated claisen rearrangement and total synthesis of (+)-Bakuchiol
Takao, Ken-Ichi,Shu, Sakamoto,Touati, Marianne Ayaka,Kusakawa, Yusuke,Tadano, Kin-Ichi
, p. 13330 - 13344 (2013/02/23)
An asymmetric Claisen rearrangement using Oppolzer's camphorsultam was developed. Under thermal conditions, a geraniol-derived substrate underwent the rearrangement with good stereoselectivity. The absolute configuration of the newly formed all-carbon quaternary stereocenter was confirmed by the total synthesis of (+)-bakuchiol from the rearrangement product.