98991-08-3Relevant articles and documents
Synthetic method for optically pure double-helix oligomeric tetra-benzocyclooctene substances
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, (2017/07/31)
The invention discloses a synthetic method for optically pure double-helix oligomeric tetra-benzocyclooctene substances. The synthetic method comprises the following steps: (1) carrying out oxidative cross-coupling on diiodo dimethoxy biphenyl (51) and 2,2',6,6'-biphenyl tetrabromide (97) to obtain 1,16-dibromo-8,9-dimethoxy tetra-benzocyclooctene (96); (2) splitting the compound (96), thus obtaining optically pure (S, S)-96 and (R, R)-96; (3) taking the compound (96) as a raw material, synthesizing an intermediate (116) containing 6 benzene rings; (4) splitting the intermediate (116) to obtain (M)-116 and (P)-116; (5) making the optically pure (S, S)-96 and (M)-116 reacted to obtain target products, namely (M) -117, (M)-149 and (M)-150; and/or: making the (R, R)-96 and (P)-116 reacted to obtain target products, namely (P)-117, (P)-149 and (P)-150.
Total synthesis of indole-3-acetonitrile-4-methoxy-2-C-β-d- glucopyranoside. Proposal for structural revision of the natural product
Yepremyan, Akop,Minehan, Thomas G.
, p. 5194 - 5196 (2012/08/08)
Indole-3-acetonitrile-4-methoxy-2-C-β-d-glucopyranoside (1), a novel C-glycoside from Isatis indigotica with important cytotoxic activity, has been prepared in ten steps from ethynyl-β-C-glycoside 3 and 2-iodo-3-nitrophenyl acetate 6. Key steps in the synthesis include a Sonogashira coupling and a CuI-mediated indole formation. NMR spectroscopic data for synthetic 1 differs from that reported for the natural product. A revised structure for the natural product, containing an alternate carbohydrate substituent, is proposed. The Royal Society of Chemistry 2012.
Chiral biphenylamide derivative: An efficient organocatalyst for the enantioselective synthesis of α-hydroxy phosphonates
Jiang, Jun,Chen, Xiaohong,Wang, Jun,Hui, Yonghai,Liu, Xiaohua,Lin, Lili,Feng, Xiaoming
supporting information; experimental part, p. 4355 - 4357 (2009/12/25)
The aldol reactions of α-keto phosphonates and aldehydes were facilitated by an axially chiral biphenylprolinamide under mild conditions, affording the synthetically and pharmaceutically useful products in high yields and excellent enantioselectivities.