374072-95-4Relevant academic research and scientific papers
Total synthesis of (-)-lemonomycin
Yoshida, Atsushi,Asakawa, Tomohiro,Hamashima, Yoshitaka,Kan, Toshiyuki,Akaiwa, Michinori,Yokoshima, Satoshi,Fukuyama, Tohru
, p. 11192 - 11195,4 (2012/12/12)
When life gives you lemons: An efficient and convergent enantioselective total synthesis of (-)-lemonomycin, which shows potent activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VREF), is presented. The key reaction steps are a Hosomi-Sakurai-type cyclization, a thermodynamically controlled Pictet-Spengler reaction, and a glycosidation reaction with lemonose (see scheme). Copyright
Enantioselective total synthesis of callipeltoside A: two approaches to the macrolactone fragment
Evans, David A.,Burch, Jason D.,Hu, Essa,Jaeschke, Georg
, p. 4671 - 4699 (2008/09/21)
The enantioselective total synthesis of callipeltoside A is described. Two syntheses of the macrolactone subunit are included: the first relies upon an Ireland-Claisen rearrangement to generate the trisubstituted olefin geometry and the second utilizes an enantioselective vinylogous aldol reaction for this purpose. Enantioselective syntheses of the sugar and chlorocyclopropane side chain fragments are also disclosed. The relative and absolute stereochemistry of this natural product was determined by fragment coupling with the two enantiomers of the side chain fragment.
An aldol-based approach to the asymmetric synthesis of L-callipeltose, the deoxyamino sugar of L-callipeltoside A.
Evans,Hu,Tedrow
, p. 3133 - 3136 (2007/10/03)
[reaction: see text] The L-callipeltose subunit of L-callipeltoside A has been synthesized in 10 steps and 13% overall yield from D-threonine. The key steps are a highly diastereoselective Felkin anti aldol addition to a methyl ketone and a selective methylation of a secondary alcohol in the presence of a secondary carbamate.
