通过处理β-Ketosulfonamides从Boc或衍生Cbz-保护的氨基酸轴承疏水性侧链以良好至优异的收率制备Ñ烯丙基,Ñ烷基methanesulfonamides与Ñ正丁基锂,接着用的甲酯所得到的碳负离子的反应Ñ -保护的1-氨基酸。使用源自N的二价阴离子的类似反应-烷基甲磺酰胺的产率要低得多。在CsF存在下,在DMF中于室温下使用Selectfluor进行β-酮磺酰胺的亲电氟化,反应时间为15-60分钟,可提供良好产率的β-酮-α,α-二氟磺酰胺。使用cat可以良好的产率除去烯丙基保护基。Pd(PPh)3)4和二甲基巴比妥酸。当以Cs 2 CO 3为碱进行氟化反应时,衍生自Val,Leu或Ile的β-酮磺酰胺给出了预期的β-酮-α,α-二氟磺酰胺,而衍生自Ala,Phe或hPhe的β-酮磺酰胺给出了亚氨基β-酮-α,α-二氟磺酰胺的水合物。
通过处理β-Ketosulfonamides从Boc或衍生Cbz-保护的氨基酸轴承疏水性侧链以良好至优异的收率制备Ñ烯丙基,Ñ烷基methanesulfonamides与Ñ正丁基锂,接着用的甲酯所得到的碳负离子的反应Ñ -保护的1-氨基酸。使用源自N的二价阴离子的类似反应-烷基甲磺酰胺的产率要低得多。在CsF存在下,在DMF中于室温下使用Selectfluor进行β-酮磺酰胺的亲电氟化,反应时间为15-60分钟,可提供良好产率的β-酮-α,α-二氟磺酰胺。使用cat可以良好的产率除去烯丙基保护基。Pd(PPh)3)4和二甲基巴比妥酸。当以Cs 2 CO 3为碱进行氟化反应时,衍生自Val,Leu或Ile的β-酮磺酰胺给出了预期的β-酮-α,α-二氟磺酰胺,而衍生自Ala,Phe或hPhe的β-酮磺酰胺给出了亚氨基β-酮-α,α-二氟磺酰胺的水合物。
[EN] ALPHA-HYDROXY PHENYLACETIC ACID PHARMACOPHORE OR BIOISOSTERE MCL-1 PROTEIN ANTAGONISTS<br/>[FR] PHARMACOPHORES D'ACIDE ALPHA-HYDROXY PHÉNYLACÉTIQUE OU ANTAGONISTES DE LA PROTÉINE BIO-ISOSTÈRE MCL-1
申请人:AMGEN INC
公开号:WO2019173181A1
公开(公告)日:2019-09-12
Provided herein are myeloid cell leukemia 1 protein (Mcl-1) inhibitors, methods of their preparation, related pharmaceutical compositions, and methods of using the same. For example, provided herein are compounds of Formula I, or a stereoisomer thereof; and pharmaceutically acceptable salts thereof and pharmaceutical compositions containing the compounds. The compounds and compositions provided herein may be used, for example, in the treatment of diseases or conditions, such as cancer.
作者:Michael D. Johnson、Gary M. Lampman、Roger W. Koops、B. Das Gupta
DOI:10.1016/0022-328x(87)80163-8
日期:1987.6
radical at the terminal unsaturated carbon of the organic ligand, with displacement of cobaloxime(II). In contrast, N-bromoacetamide and several other N-halogenoimides react regiospecifically to give the cyclopropylcarbinyl halide or the rearranged allyl halide by a process in which a halogen-containing free radical species attacks the terminal unsaturated carbon of the organocobaloxime.
Diuretics. II. Alkoxymercuration by Mixed Anion Salts of Mercury
作者:Calvert W. Whitehead、John J. Traverso
DOI:10.1021/ja01542a037
日期:1958.5
pH optimization of nucleophilic reactions in water
作者:J. F. King、R. Rathore、J. Y. L. Lam、Z. R. Guo、D. F. Klassen
DOI:10.1021/ja00034a040
日期:1992.4
We present a way of prescribing the pH for a reaction so as to obtain either (a) maximum yield in competition with hydrolysis or (b) selective reaction at either of two sites in such nucleophile-electrophile reactions as C-alkylation of acidic ketones and the acylation and sulfonylation of amines. First, we derive the following general equation for pH(max), the pH giving the highest yield of the product (P) of the reaction of a nucleophile (Nu) with a hydrolyzable electrophile (E) in water: pH(max) = 1/2[log (k(w)/k(OH)) + pK(w) + pK(a)] (k(w) and k(OH) refer to the water- and hydroxide-promoted hydrolyses of E, K(w) is the autoprotolysis constant of water, and K(a) is the acid dissociation constant of NuH+, the conjugate acid of Nu). pH(max) thus depends on a property of E (namely, k(w)/k(OH)) and a property of Nu (the pK(a) of NuH+), but not on the rate constant for the reaction of E with Nu or the concentration of Nu. We then deduce analogous approximate equations for maximum selectivity for reaction at either of two nucleophilic sites, specifically, equations giving pH(xmax) and pH(ymax), the pH values for the maximum yields of the respective products (P(x) and P(y)) of the reactions of E with the two nucleophiles. We find that (a) pH-yield profiles calculated from the equations concur with observed yields for reactions under pseudo-first-order conditions and (b) preparative experiments at the estimated pH values give good to excellent yields of clean products and high selectivity in both the C-alkylation and Schotten-Baumann reactions.
ATLANI, M.;LOUTATY, R.;WAKSELMAN, C.;YACONO, C.
作者:ATLANI, M.、LOUTATY, R.、WAKSELMAN, C.、YACONO, C.