252919-50-9Relevant articles and documents
Asymmetric synthesis of trans-2,3-piperidinedicarboxylic acid and trans-3,4-piperidinedicarboxylic acid derivatives
Xue, Chu-Biao,He, Xiaohua,Roderick, John,Corbett, Ronald L.,Decicco, Carl P.
, p. 865 - 870 (2002)
Asymmetric syntheses of (2S,3S)-3-(tert-butoxycarbonyl)-2-piperidinecarboxylic acid (1b), (3R,4S)-4-(tert-butoxycarbonyl)-3-piperidinecarboxylic acid (2b), and their corresponding N-Boc and N-Cbz protected analogues 8a,b and 17a,b are described. Enantiomerically pure 1b has been synthesized in five steps starting from L-aspartic acid β-tert-butyl ester. Tribenzylation of the starting material followed by alkylation with allyl iodide using KHMDS produces the key intermediate 5a in a 6:1 diastereomeric excess. Upon hydroboration, the alcohol 6a is oxidized, and the resulting aldehyde 7 is subjected to a ring closure via reductive amination, providing 1b in an overall yield of 38%. Optically pure 2b has been synthesized beginning with N-Cbz-β-alanine. The synthesis involves the induction of the first stereogenic center using Evans's chemistry and sequential LDA-promoted alkylations with tert-butyl bromoacetate and allyl iodide. Further elaboration by ozonolysis and reductive amination affords 2b in an overall yield of 28%.
AZA SPIRO ALKANE DERIVATIVES AS INHIBITORS OF METALLPROTEASES
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Paragraph 0135, (2015/12/18)
The present invention provides a compound of Formula (I) or Formula (II): enantiomer, diastereomer, prodrug, solvate, metabolite, or pharmaceutically acceptable salt thereof, wherein constituent variables are provided herein. The compounds of Formula (I) and (II) are modulators of metalloproteases and are useful in treating diseases associated with metalloprotease activity such as arthritis, cancer, cardiovascular disorders, skin disorders, inflammation and allergic conditions.
