58608-97-2Relevant articles and documents
The total syntheses of JBIR-94 and two synthetic analogs and their cytotoxicities against A549 (CCL-185) human small lung cancer cells
Mangum, Cathy L.,Munford, Mica B.,Sam, Alyssa B.,Young, Sandra K.,Beales, Jeremy T.,Subedi, Yagya Prasad,Mangum, Chad D.,Allen, Tanner J.,Liddell, Miranda S.,Merrell, Andrew I.,Saavedra, Diana I.,Williams, Becky L.,Evans, Nicole,Beales, Joseph L.,Christiansen, Michael A.
, (2020)
We here disclose the total syntheses of the natural polyphenol JBIR-94 and two nonnatural analogs, whose structures are of interest for their bioactivity potential as radical scavengers. Although we initially attempted this by dually acylating both of putrecine's amine nitrogens in a single pot, our endeavors with this method (which has been successfully reported by other groups) proved ineffectual. We accordingly opted for the lengthier approach of acylating each amine individually, which gratuitously prevailed and also aligns with separate literature precedent. Moreover, we here share our analysis of these target compounds’ cytotoxicities and IC50 values against A549 (CCL-185) human small lung cancer cells.
NOVEL ETHER LINKED COMPOUNDS AND IMPROVED TREATMENTS FOR CARDIAC AND CARDIOVASCULAR DISEASE
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Page/Page column 30, (2012/08/27)
A compound of Formula (I), and its pharmaceutically acceptable salt or salts and physiologically hydrolysable derivatives in free form or salt form: wherein R1 is independently selected from F, CI, Br, CN, NH2, OH, CHO, COOH, oxo, C1-4alkyl, C1-4alkoxy, CONH2 (optionally mono- or di-substituted by C1-4alkyl) and SO2NH2, R2 is independently selected from C1-6allkyl substituted by R3 wherein the C1-6alkyl chain optionally comprises one or two heteroatoms select from O; R3 is selected from aryl, C3-6cycloalkyl, C3-6heterocyclyl and C3-6heteroaryl, wherein the heterocyclyl and heteroaryl rings are nitrogen containing; and wherein R3 is optonally substituted by one or more groups selected from R1; n1 is zero or an integer from 1 to 2; n2 is an integer from 1 to 2; and the sum of n1 and 2 is less than or equal to 2; R5 is selected from any group defined for R1 and R2; R6a and R6b are independently selected from H or C1-4alkyl; R7 is independently selected from F, CI, Br, CN, NH2, OH, CHO, COOH, oxo, C1-4alkyl, C1-4alkoxy, CONH2 (optionally mono- or di-substituted by C1-4alkyl) and SO2NH2, Q1, Q2 and Q3 are independently selected from H or any group defined for R1 and R2; or Q1 and Q2 or Q2 and Q3 together form a C5-6heteroaryl or C5-6heterocylclic ring; optionally containing one or two heteroatoms selected from N and O optionally substituted by any group selected from R5; Z is selected from linear C2-3 alkylene; X3 is O; X4 is selected from aryl, a 9-10 membered heteroaryl ring or a 9-10 membered heterocyclic ring, wherein the heteroaryl and heterocyclic rings contain one or more heteroatoms selected from N, and optionally additionally O, and wherein X4 is optionally substituted by one or two oxo moieties and is optionally substituted by one or more groups selected from R7; with the proviso that: (i) when X4 is phenyl then Q1 and Q2 or Q2 and Q3-together form an optionally substituted heteroaryl or heterocylclic ring as defined above; and (ii) when Q1, Q2 and Q3 are independently selected from H or any group defined for R1 and R2 then X4 is not phenyl except when R2 is C1-5alkyl substituted by R3 wherein R3 is C3-6heterocyclyl as defined above.
Synthesis of the alkaloid tyroscherin by an aldol/Curtius strategy
Ugele, Markus,Maier, Martin E.
supporting information; experimental part, p. 2633 - 2641 (2010/05/01)
The alkaloid tyroscherin (2), which contains a vicinal anti-amino alcohol subunit was prepared from 4-hydroxyphenylpropionic acid (5) and meso-diol 9. After desymmetrization of diol 9 and suitable protecting group manipulations, one terminus was extended via a Claisen rearrangement giving rise to enoate ent-15. The missing carbon on the other end could be incorporated using MeMgCl/CuBr·SMe2 leading eventually to aldehyde ent-22. The acylated oxazolidinone 32 derived from acid 5 and aldehyde ent-22 were combined in an aldol reaction. A subsequent Curtius rearrangement on the carboxylic group furnished the amino function of tyroscherin (2). In a proof of concept study the same strategy was used to prepare tyroscherin analog 28.
