A Facile Synthesis of Methyl 5-Amino-6-chloro-2H-1-benzopyran-8-carboxylate Derivatives
摘要:
Methyl 6-chloro-5-pivaloy lamino-2H-1-benzopyran-8-carboxylate (4d) was prepared in good yield as a result of' the thermal cylcization of methyl 5-chloro-4-pivaloy lamino-2-propargyloxy benzoate (3d) using N.N-diethylaniline as a solvent.
A facile gold(I)-catalysed intramolecular alkyne hydroarylation approach to methyl 5-amino-2H-1-benzopyran-8-carboxylate derivatives
作者:Neil R. Curtis、Jeremy C. Prodger、Geracimos Rassias、Andrew J. Walker
DOI:10.1016/j.tetlet.2008.08.022
日期:2008.10
A high yielding and selective method for producing methyl 5-amino-2H-1-benzopyran-8-carboxylate derivatives via gold(I)-catalysed intramolecular alkyne hydroarylation has been developed.
已经开发了通过金(I)催化的分子内炔烃加氢芳基化反应制备5-氨基-2 H -1-苯并吡喃-8-羧酸甲酯衍生物的高产率和选择性方法。
JPH08157466A
申请人:——
公开号:JPH08157466A
公开(公告)日:1996-06-18
A Facile Synthesis of Methyl 5-Amino-6-chloro-2H-1-benzopyran-8-carboxylate Derivatives
作者:Takuji Kakigami、Kunihisa Baba、Toshinao Usui
DOI:10.3987/com-98-8294
日期:——
Methyl 6-chloro-5-pivaloy lamino-2H-1-benzopyran-8-carboxylate (4d) was prepared in good yield as a result of' the thermal cylcization of methyl 5-chloro-4-pivaloy lamino-2-propargyloxy benzoate (3d) using N.N-diethylaniline as a solvent.
Investigation of Synthetic Routes to a Key Benzopyran Intermediate of a 5HT<sub>4</sub> Agonist
作者:Geracimos Rassias、Neil G. Stevenson、Neil R. Curtis、John M. Northall、Matthew Gray、Jeremy C. Prodger、Andrew J. Walker
DOI:10.1021/op900188v
日期:2010.1.15
The supply route to GlaxoSmithKline’s 5HT4 receptor agonist 1 centred on the construction of key benzopyran fragment 2. Our attempts to define the final manufacturing route for this component are described through a series of disconnections. The systematic approach undertaken towards the construction of the benzopyran skeleton focused on cyclisation strategies from appropriate precursors and evaluation