Novel Synthesis of 1,2-Dihydro-4H-3,1-benzoxazine-4-thiones by the Reaction of Newsynthesized Methyl Dithioanthranilate Hydrobromide with Carbonyl Compounds and the Formation of Another New Class of 1,2-Dihydro-4H-3,1-benzothiazine-4-thiones from the Same Reactants in the Presence of Excess Sodium Hydrogensulfide
摘要:
Methyl dithioanthranilate hydrobromide (6) was synthesized by the deprotection of Z-protected methyl dithioanthranilate (5) which was obtained by treatment of Z-protected methylthioiminium iodide 4 with H2S. The 1,2-dihydro-4H-3,1-benzoxazine-4-thiones 10a-m were first synthesized by the reaction of methyl dithioanthranilate hydrobromide (6) with each aldehyde or ketone. Formaldehyde, in this reaction, gave N-(methylthio)methy1-4H-3,1benzoxazine-4-thione(11). Another new class of 1,2-dihydro-4H-3,1-benzothiazine-4-thiones 12a-e were synthesized from the same reactants in the presence of two equivalents of sodium hydrogensulfide.
Novel Synthesis of 1,2-Dihydro-4H-3,1-benzoxazine-4-thiones by the Reaction of Newsynthesized Methyl Dithioanthranilate Hydrobromide with Carbonyl Compounds and the Formation of Another New Class of 1,2-Dihydro-4H-3,1-benzothiazine-4-thiones from the Same Reactants in the Presence of Excess Sodium Hydrogensulfide
摘要:
Methyl dithioanthranilate hydrobromide (6) was synthesized by the deprotection of Z-protected methyl dithioanthranilate (5) which was obtained by treatment of Z-protected methylthioiminium iodide 4 with H2S. The 1,2-dihydro-4H-3,1-benzoxazine-4-thiones 10a-m were first synthesized by the reaction of methyl dithioanthranilate hydrobromide (6) with each aldehyde or ketone. Formaldehyde, in this reaction, gave N-(methylthio)methy1-4H-3,1benzoxazine-4-thione(11). Another new class of 1,2-dihydro-4H-3,1-benzothiazine-4-thiones 12a-e were synthesized from the same reactants in the presence of two equivalents of sodium hydrogensulfide.
Novel Synthesis of 1,2-Dihydro-4H-3,1-benzoxazine-4-thiones by the Reaction of Newsynthesized Methyl Dithioanthranilate Hydrobromide with Carbonyl Compounds and the Formation of Another New Class of 1,2-Dihydro-4H-3,1-benzothiazine-4-thiones from the Same Reactants in the Presence of Excess Sodium Hydrogensulfide
作者:Tatsuo Yamamoto、Motomu Muraoka
DOI:10.3987/com-15-13336
日期:——
Methyl dithioanthranilate hydrobromide (6) was synthesized by the deprotection of Z-protected methyl dithioanthranilate (5) which was obtained by treatment of Z-protected methylthioiminium iodide 4 with H2S. The 1,2-dihydro-4H-3,1-benzoxazine-4-thiones 10a-m were first synthesized by the reaction of methyl dithioanthranilate hydrobromide (6) with each aldehyde or ketone. Formaldehyde, in this reaction, gave N-(methylthio)methy1-4H-3,1benzoxazine-4-thione(11). Another new class of 1,2-dihydro-4H-3,1-benzothiazine-4-thiones 12a-e were synthesized from the same reactants in the presence of two equivalents of sodium hydrogensulfide.