onclick Javascript in Lightning

This button works in lightning. "/lead/leadconvert.jsp?retURL=%2F{!Lead.Id}&id={!Lead.Id}" .

But I am getting error on this one: "/lead/leadconvert.jsp?retURL=%2F{!Lead.Id}&id={!Lead.Id}&nooppti=1". The error message is 'URL No longer Exists'. How can I fix it in lightning?

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