Tumor-Activated Benzothiazole Inhibitors of Stearoyl-CoA Desaturase
作者:Noelle S. Williams、Stephen Gonzales、Jacinth Naidoo、Giomar Rivera-Cancel、Sukesh Voruganti、Prema Mallipeddi、Panayotis C. Theodoropoulos、Sophie Geboers、Hong Chen、Francisco Ortiz、Bruce Posner、Deepak Nijhawan、Joseph M. Ready
DOI:10.1021/acs.jmedchem.0c00899
日期:2020.9.10
A series of N-acyl benzothiazoles shows selective and potentcytotoxicity against cancer cell lines expressing cytochrome P450 4F11. A prodrug form is metabolized by cancer cells into an active inhibitor of stearoyl-CoA desaturase (SCD). Substantial variation on the acyl portion of the inhibitors allowed the identification of (R)-27, which balanced potency, solubility, and lipophilicity to allow proof-of-concept
Highly Selective Addition of a Broad Spectrum of Trimethylsilane Pro-nucleophiles to <i>N</i>
-<i>tert</i>
-Butanesulfinyl Imines
作者:Manas Das、Donal F. O'Shea
DOI:10.1002/chem.201503354
日期:2015.12.14
Addition of organotrimethylsilane reagents to chiral N‐tert‐butanesulfinyl imines can be achieved in good yields and with excellent diastereoselectivities by employing TMSO−/Bu4N+ as a Lewis base activator in THF. A variety of aliphatic, aromatic, heteroaromatic and organometallic chiral imines were utilised as electrophiles for the synthesis of enantioenriched N‐tert‐butanesulfinyl amides. Remarkably
Stereodivergent Mannich reaction of bis(trimethylsilyl)ketene acetals with N-tert-butanesulfinyl imines by Lewis acid or Lewis base activation, a one-pot protocol to obtain chiral β-amino acids
We report a one-pot synthesis of chiral β2,2,3-amino acids by the Mannich addition of bistrimethylsilyl ketene acetals to N-tert-butanesulfinyl imines followed by the removal of the chiral auxiliary. The synthesis and isolation of pure β-amino acid hydrochlorides were conducted under mild conditions, without strong bases and this method is operationallysimple. The stereoselective reaction was promoted
A diastereoselective Mannichreaction of simple α-fluoro ketones with N-tert-butylsulfinylimines was developed. This method provides a concise route to a variety of structurally diverse α-fluoro-β-amino ketones containing fluorinated stereogenic carbon centers; good yields and high diastereoselectivities were achieved. This method uses readily accessible starting materials and has a broad substrate
Diastereoselective Addition of Metal α-Fluoroenolates of Carboxylate Esters to <i>N</i>-<i>tert</i>-Butylsulfinyl Imines: Synthesis of α-Fluoro-β-amino Acids
作者:Huaqi Shang、Ya Li、Xiang Li、Xinfeng Ren
DOI:10.1021/acs.joc.5b01574
日期:2015.9.4
We report a diastereoselective addition reaction of fluoroacetate and α-alkylated fluoroacetate to N-tert-butylsulfinyl imines. This method provides a concise route to α-fluoro-β-amino acids containing fluorinated quaternary stereogenic carbon centers with very good yields and high diastereoselectivities. This protocol has the benefit of using abundant and readily accessible starting materials and