A palladium catalyzed efficient synthesis of γ-methylene-α,β-unsaturated γ-lactones via cyclization of 3,4-alkadienoic acids
摘要:
An efficient method was developed for the synthesis of gamma-methylene-alpha, beta-unsaturated gamma-lactones from the Pd-catalyzed cyclization of 3,4-alkadienoic acids. Control experiment shows that the reaction should be carried out under a N-2 atmosphere to ensure the high purity of the products. (c) 2005 Elsevier Ltd. All rights reserved.
This work describes the study of behavior of the δ-substituted and δ-non-substituted exo-cyclic double bond of γ-alkylidenebutenolides with dialkylcuprates. The addition reaction was found to be regioselective to afford the 1,6-conjugate adduct up to 87% yield.
The molecular complexity of recently reported cobalt(III) polycyclic complexes, resulting from an intramolecular formal (2 + 2 + 3) cycloaddition reaction on an enediyne containing a lactone moiety, has prompted us to computationally review the mechanisms of cobalt cycloaddition reactions with γ-alkylidenebutenolide or γ-alkylidenebuterolactam as 2π partners. Computed mechanisms are compared, leading
COMPOUNDS THAT ABROGATE THE CELL CYCLE G2 CHECKPOINT FOR USE IN THE TREATMENT OF CANCER
申请人:CanBas Co., Ltd.
公开号:EP3088397A1
公开(公告)日:2016-11-02
Substituted azole diones (II) and (III) are provided that kill cells, suppress cell proliferation, suppress cell growth, abrogate the cell cycle G2 checkpoint and/or cause adaptation to G2 cell cycle arrest. Methods of making the invention compounds are provided. The invention provides substituted azole diones (II) and (III) to treat cell proliferation disorders. The invention includes the substituted azole diones (II) and (III) for use to selectively kill or suppress cancer cells without additional anti-cancer treatment. The invention includes the cell cycle G2- checkpoint-abrogating substituted azole diones (II) and (III) for use to selectively sensitize cancer cells to DNA damaging reagents, treatments and/or other types of anti-cancer reagents.
An annelation approach to the synthesis of eudesmane and elemane sesquiterpene lactones. Total synthesis of dl-dihydrocallitrisin, dl-7,8-epialantolactone, dl-7,8-epiisoalantolactone, and dl-atractylon
作者:Arthur G. Schultz、Jollie D. Godfrey
DOI:10.1021/ja00527a046
日期:1980.3
Babidge, Peter J.; Massy-Westropp, Ralph A., Australian Journal of Chemistry, 1981, vol. 34, # 8, p. 1745 - 1756