In the presence of a Cu(I) catalyst and a pyridine oxide, alkynyl oxiranes and oxetanes can be converted into functionalized five- or six-membered α,β-unsaturated lactones or dihydrofuranaldehydes. This new oxidative cyclization is proposed to proceed via an unusual allenyloxypyridinium intermediate.
Spiro[2H-1,4-benzodioxepin-3(5H)4'-piperidine and -3'pyrrolidine]
申请人:Hoechst-Roussel Pharmaceuticals Inc.
公开号:US04405631A1
公开(公告)日:1983-09-20
Spiro[2H-1,4-benzodioxepin-3(5H)4'-piperidine and -3-pyrrolidine] compounds of the formula ##STR1## where the substituents are as defined herein, are useful in the treatment of hypertension in mammals. Such compounds, their use as antihypertensive agents, pharmaceutical compositions containing the compounds, intermediates and processes for preparing the compounds are provided.
Intermediates for spiro[2H-1,4-benzodioxepin-3(5H)4'piperidine and
申请人:Hoechst-Roussel Pharmaceuticals Inc.
公开号:US04668791A1
公开(公告)日:1987-05-26
Spiro[2H-1,4-benzodioxepin-3(5H)4'-piperidine and -3-pyrrolidine] compounds of the formula ##STR1## where the substituents are as defined herein, are useful in the treatment of hypertension in mammals. Such compounds, their use as antihypertensive agents, pharmaceutical compositions containing the compounds, intermediates and processes for preparing the compounds are provided.
Intermediates for spiro[2H-1,4 benzodioxepin-3(5H)4'-piperidine and
申请人:Hoechst-Roussel Pharmaceuticals Inc.
公开号:US04695637A1
公开(公告)日:1987-09-22
Spiro[2H-1,4-benzodioxepin-3(5H)4'-piperidine and -3-pyrrolidine] compounds of the formula ##STR1## where the substituents are as defined herein, are useful in the treatment of hypertension in mammals. Such compounds, their use as antihypertensive agents, pharmaceutical compositions containing the compounds, intermediates and processes for preparing the compounds are provided.
Spiro (2H-1,4-benzodioxepin-3 (5H)4-piperidine and -3-pyrrolidine)
申请人:Hoechst-Roussel Pharmaceuticals Incorporated
公开号:US04472580A1
公开(公告)日:1984-09-18
Spiro[2H-1,4-benzodioxepin-3(5H)4'-piperidine and -3-pyrrolidine] compounds of the formula ##STR1## where the substituents are as defined herein, are useful in the treatment of hypertension in mammals. Such compounds, their use as antihypertensive agents, pharmaceutical compositions containing the compounds, intermediates and processes for preparing the compounds are provided.