4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkyl\x9bb!pyran-2-ones
申请人:Pharmacia & Upjohn Company
公开号:US05686486A1
公开(公告)日:1997-11-11
The present invention relates to compounds of formula I which are 4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkyl\x9bb!pyran-2-ones useful for inhibiting a retrovirus in a mammalian cell infected with said retrovirus. ##STR1## Wherein R.sub.10 and R.sub.20 taken together are: ##STR2##
4-HYDROXY-BENZOPYRAN-2-ONES AND 4-HYDROXY-CYCLOALKYL B]PYRAN-2-ONES USEFUL TO TREAT RETROVIRAL INFECTIONS
申请人:THE UPJOHN COMPANY
公开号:EP0682663A1
公开(公告)日:1995-11-22
US5686486A
申请人:——
公开号:US5686486A
公开(公告)日:1997-11-11
[EN] 4-HYDROXY-BENZOPYRAN-2-ONES AND 4-HYDROXY-CYCLOALKYL[B]PYRAN-2-ONES USEFUL TO TREAT RETROVIRAL INFECTIONS<br/>[FR] 4-HYDROXY-BENZOPYRANE-2-ONES ET 4-HYDROXY-CYCLOALKYLE-[B]PYRANE-2-ONES UTILES POUR LE TRAITEMENT DES INFECTIONS RETROVIRALES
申请人:THE UPJOHN COMPANY
公开号:WO1994018188A1
公开(公告)日:1994-08-18
(EN) The present invention relates to compounds of formula (I) which are 4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkyl[b]pyran-2-ones useful for inhibiting a retrovirus in a mammalian cell infected with said retrovirus. In formula (I) R10 and R20 taken together are formula (II) or formula (III).(FR) Composés de la formule (I) correspondant à des 4-hydroxy-benzopyrane-2-ones et à des 4-hydroxy-cycloalkyle[b]pyrane-2-ones employés pour l'inhibition d'un rétrovirus dans une cellule de mammifère infectée par ledit rétrovirus. Dans la formule (I) R10 et R20 considérés ensemble sont (II) ou (III).
CuBr2-catalyzed ring opening/formylation reaction of cyclopropyl carbinols with DMF to synthesize formate esters
作者:Daijiao Zhuang、Tharcisse Gatera、Rulong Yan
DOI:10.1016/j.tetlet.2020.152506
日期:2020.11
An unprecedented protocol for the synthesis of formate esters has been developed by employing N,N-dimethylformamide (DMF) as both the source of CHO and solvent. This reaction undergoes ringopening of the cyclopropyl carbinols and in situ formation of homoallylic alcohols, which reacts with DMF to give the desired products. The substrate cyclopropyl carbinols with different groups participate smoothly