Desymmetrization of pibrentasvir for efficient prodrug synthesis
作者:Eric A. Voight、Stephen N. Greszler、John Hartung、Jianguo Ji、Russell C. Klix、John T. Randolph、Bhadra H. Shelat、Jan E. Waters、David A. DeGoey
DOI:10.1039/d1sc02396a
日期:——
A novel and practical desymmetrization tactic is described to access a new class of pibrentasvir prodrugs. The homotopic benzimidazoles of pibrentasvir (PIB) are differentiated via a one-pot di-Boc/mono-de-Boc selective N-Boc protection and formaldehyde adduct formation sequence, both enabled by crystallization-induced selectivity. The first step represents the only known application of the Horeau
An efficient and versatile synthesis of acylpolyamine spider toxins
作者:Ken-ichi Nihei、Massuo J Kato、Tetsuo Yamane、Mario S Palma、Katsuhiro Konno
DOI:10.1016/s0960-894x(01)00733-8
日期:2002.2
An efficient and versatile synthesis of acylpolyamine spider toxins was developed based on the structural classification of the Nephila and Nephilengys spider toxins using the 2-nitrobenzenesulfonamide protecting group. The naturally occurring toxins 1-5 representing each structural type have been efficiently synthesized by this method in a high overall yield with few steps. (C) 2002 Elsevier Science Ltd. All rights reserved.
An efficient and versatile synthesis of all structural types of acylpolyamine spider toxins
作者:Ken-ichi Nihei、Massuo J. Kato、Tetsuo Yamane、Katsuhiro Konno
DOI:10.1016/j.tet.2006.06.051
日期:2006.8
An efficient and versatile synthesis of acylpolyamine spider toxins of all structural types classified by extensive MS analysis has been achieved. By using 2-nitrobenzenesulfonamide as an effective activating and/or protecting group (the Nosyl strategy), the naturally occurring toxins 1-8 corresponding to Types A-F were concisely synthesized in high overall yield. (c) 2006 Elsevier Ltd. All rights reserved.