23596-90-9Relevant academic research and scientific papers
Iron(III) Chloride/Phenylsilane-Mediated Cascade Reaction of Allyl Alcohols with Maleimides: Synthesis of Poly-Substituted γ-Butyrolactones
Zhang, Hua,Zhan, Xiao-Yu,Chen, Xu-Ling,Tang, Lei,He, Shuai,Shi, Zhi-Chuan,Wang, Yu,Wang, Ji-Yu
, p. 4919 - 4925 (2019)
A iron-catalyzed free radical cascade reaction of allyl alcohols with N-substituted maleimides for accessing poly-substituted γ-butyrolactones has been developed. In this protocol, various allyl alcohols can open N-substituted maleimide rings to form allyl ester intermediates, and the allyl ester intermediates can be converted into an allyl ester alkyl radicals and undergo intramolecular free radical addition cyclization to form a polysubstituted γ-butyrolactones. In this protocol, spiro γ-butyrolactone compounds can be also synthesized. Meanwhile, the strategy could be applied to further construct a fully substituted tetrahydrofuran. The reaction is not sensitive to oxygen or moisture and has been performed on gram-scale. (Figure presented.).
CATHEPSIN CYSTEINE PROTEASE INHIBITORS
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Page 64, (2010/02/06)
This invention relates to class of compounds which are cysteine protease inhibitors, including but not limited to, inhibitors of cathepsins K, L, S and B. These compounds are useful for treating diseases in which inhibition of bone resorption is indicated, such as osteoporosis. They have the following structure: Formula (I).
