Opening of cyclic acetals by trichloro-, dichloro-, and tribromo-borane
作者:Trevor G. Bonner、David Lewis、Keith Rutter
DOI:10.1039/p19810001807
日期:——
The rate-determining step in the ring opening of cyclicacetals by trichloroborane to yield α-chloro-ethers is shown to be consistent with the formation of an oxocarbenium ion. Subsequent reduction provides a general route for the conversion of a diol into a hydroxy-ether. Tribromoborane is a more powerful and dichloroborane a less powerful reagent than trichloroborane.
Protein tyrosine phosphatase inhibitors and methods of use thereof
申请人:Calico Life Sciences LLC
公开号:US10954202B2
公开(公告)日:2021-03-23
Provided herein are compounds, compositions, and methods useful for inhibiting protein tyrosine phosphatase, e.g., protein tyrosine phosphatase non-receptor type 2 (PTPN2) and/or protein tyrosine phosphatase non-receptor type 1 (PTPN1), and for treating related diseases, disorders and conditions favorably responsive to PTPN1 or PTPN2 inhibitor treatment, e.g., a cancer or a metabolic disease.
Investigation of the catalytic activity of an electron-deficient vanadium(IV) tetraphenylporphyrin: A new, highly efficient and reusable catalyst for ring-opening of epoxides
In this work, the catalytic activity of high-valent tetraphenylporphyrinatovanadium(IV) trifluoromethanesulfonate, [V-IV(TPP)(OTf)(2)], in the nucleophilic ring-opening of epoxides is reported. This new V(IV) catalyst was used as an efficient catalyst for alcoholysis with primary (methanol, ethanol and n-propanol), secondary (iso-propanol) and tertiary alcohols (tert-butanol), hydrolysis and acetolysis of epoxides with acetic acid and also for the conversion of epoxides to 1,2-diacetates with acetic anhydride, conversion of epoxides to thiiranes with ammonium thiocyanate and thiourea, and for conversion of epoxides to acetonides with acetone. The catalyst was reused several times without loss of its activity. (C) 2011 Elsevier Ltd. All rights reserved.
BONNER T. G.; LEWIS D.; RUTTER K., J. CHEM. SOC. PERKIN TRANS., 1981, PART 1, NO 7, 1807-1810
作者:BONNER T. G.、 LEWIS D.、 RUTTER K.
DOI:——
日期:——
PROTEIN TYROSINE PHOSPHATASE INHIBITORS AND METHODS OF USE THEREOF
申请人:Calico Life Sciences LLC
公开号:US20210009542A1
公开(公告)日:2021-01-14
Provided herein are compounds, compositions, and methods useful for inhibiting protein tyrosine phosphatase, e.g., protein tyrosine phosphatase non-receptor type 2 (PTPN2) and/or protein tyrosine phosphatase non-receptor type 1 (PTPN1), and for treating related diseases, disorders and conditions favorably responsive to PTPN1 or PTPN2 inhibitor treatment, e.g., a cancer or a metabolic disease.