Novel Synthesis of 4-Arylsulfenyl-3-hydroxy-2-pyrone: One Pot Substitution-Rearrangement-Cyclization Reaction of Acetonide Protected 4,5-Dihydroxy-2-chloroglycidic Ester by Sodium Arylthiolate
Synthesis of Anthraquinone Derivatives: Tandem Diels-Alder-Decarboxylation-Oxidation Reaction of 3-Hydroxy-2-pyrone with 1,4-Naphthoquinone
作者:Sadao Tsuboi、Takuzo Komiyama、Yutaka Takaguchi
DOI:10.1055/s-2005-922769
日期:——
In the presence of triethylamine, the Diels-Alder reaction of 3-hydroxy-2-pyrones with 1,4-naphthoquinones by a decarboxylation-oxidation process gave anthraquinonederivatives in good to excellent yields.
One‐Pot Synthesis of 2‐Arylthio‐2‐cyclohexenone Derivatives by the Diels–Alder Reaction of 4‐Arylthio‐3‐hydroxy‐2‐pyrones
作者:Takuzo Komiyama、Yutaka Takaguchi、Sadao Tsuboi
DOI:10.1080/00397910701392434
日期:2007.7.1
The base-catalyzed Diels-Alder reactions of 4-arylthio-3- hydroxy-2-pyrones are reported. Treatment of 4-arylthio-3- hydroxy-2-pyrones and dienophiles with triethylamine gave 2-arylthio-2-cyclohexenone derivatives by the Diels-Alder reaction involving a decarboxylation in excellent to reasonable yields.
Synthesis of 4‐Arylthio‐3‐hydroxyphthalate by the Diels–Alder Reactionof 4‐Arylthio‐3‐hydroxy‐2‐pyrone
作者:Takuzo Komiyama、Yutaka Takaguchi、Sadao Tsuboi
DOI:10.1080/00397910601055016
日期:2007.3
Treatment of 4-arylthio-3-hydroxy-2-pyrones with acetylenedicarboxylates gave 4-arylthio-3-hydroxyphthalates by the base-catalyzed Diels-Alder reaction via a decarboxylation in good yields.
Novel Synthesis of 4-Arylsulfenyl-3-hydroxy-2-pyrone: One Pot Substitution-Rearrangement-Cyclization Reaction of Acetonide Protected 4,5-Dihydroxy-2-chloroglycidic Ester by Sodium Arylthiolate
作者:Sadao Tsuboi、Takuzo Komiyama、Yutaka Takaguchi
DOI:10.3987/com-05-s(k)60
日期:——
Effective One-Pot Synthesis of 5-Hydroxy-1,4-naphthoquinone Derivatives
作者:Sadao Tsuboi、Takuzo Komiyama、Yutaka Takaguchi
DOI:10.1055/s-2006-926417
日期:2006.5
In the presence of triethylamine, Diels-Alder reaction, involving decarboxylation-oxidation reaction of 3-hydroxy-2-pyrones with 1,4-benzoquinones gave 5-hydroxy-1,4-naphthoquinone derivatives in excellent to reasonable yields.