Stereoselective Synthesis and Some Properties of New Chlorodiorganotin-Substituted Macrodiolides
摘要:
Radical tandem addition of dialkyltin chlorohydrides, R2SnHCl (R = n-Bu, neophyl, Ph), to TADDOL's substituted diacrylates (4-7) led to the corresponding products of cyclohydrostannation. The new optically active chlorodialkyltin-substituted 11-membered macrodiolides were obtained in very good yields and with much higher stereoselectivity than that achieved with the corresponding monohydrides, R3SnH. Thus, the cyclohydrostannation of diacrylate 4 and dimethacrylate 5 lead to just one diastereomer in the first case and to an easily separable mixture of two diastereomers in the second. Reduction of the new organotin macrocycles with LiAlH4 afforded optically active organotin derivatives structurally related to glutaric acid. Oxidation of the new chlorodiorganotin-substituted macrocycles with 30% hydrogen peroxide gave the new 11-membered macrocycles 30 and 31 free of tin in an average total yield of 43.4% from TADDOL. Full H-1, C-13, and Sn-119 data are also reported.
Synthesis of Unsaturated Diesters of Primary, Secondary and Tertiary Diols Derived from Dimethyl (+)-Tartrate and Galactaric Acid
作者:Jimena Scoccia、Darío C. Gerbino、Victor F. Terraza、Adriana E. Zúñiga、Julio C. Podestá
DOI:10.1002/ejoc.201300130
日期:2013.7
The preparation of symmetrical unsaturated diesters of dioe first was the reaction of mixed anhydrides, obtained from α,β-unsaturated acids and benzoyl chloride, with diols 3 (primary), 5 (secondary), and 7 (primary), i.e., Yamaguchi–SantaLucia's method, however only the symmetrical diacrylates of diols 5 and 7 were obtained quantitatively. In the other ten cases studied the reactions led to mixtures
Highly isotactic optically active methacrylate polymers by free radical cyclopolymerization
作者:Shiying Zheng、Dotsevi Y. Sogah
DOI:10.1016/s0040-4020(97)00974-5
日期:1997.11
Isospecificfreeradical cyclopolymerization of tartrate-based monomers gives polymers with very high optical rotations. Circular dichroism and polarimetric measurements suggest the polymers are rigid and ordered. Their high resistance to solvolysis suggests potential applications in chiral chromatography.
Toward the cholinesterase inhibition potential of TADDOL derivatives: Seminal biological and computational studies
作者:Andrea R. Costantino、Nitin Charbe、Yorley Duarte、Margarita Gutiérrez、Ady Giordano、Parteek Prasher、Kamal Dua、Sandra Mandolesi、Flavia C. Zacconi
DOI:10.1002/ardp.202200142
日期:2022.11
family (organophosphates), with several reports indicating an intersection between the pesticide's activity and AD. In this study, various TADDOL derivatives were synthesized and their in vitro activities as AChE/BuChE inhibitors as well as their antioxidant activities were studied. Molecular modeling studies revealed the capability of TADDOL derivatives to bind to AChE and induce inhibition, especially