mention a few amendments?
A need for a different way of amending the Constitution was felt, but no voting was carried out regarding this.
Constitutional Convention (United States)
The delegates recognized that a major flaw with the Articles of Confederation was that any constitutional amendment required unanimous approval of the states. On July 23, the convention endorsed the need for a different way of amending the Constitution, but it was not prepared to vote on specifics. 
all of the delegates to the constitutional convention generally agreed that The goal would be a new system of government, not simply a revised version of the Articles of Confederation. what was the convention about? To revise the league of states and first system of government under the Articles of Confederation. where was it held? At the Pennsylvania State House. what were revisions done on slavery in the convention? Congress would have the power to ban the international slave trade, but not for another twenty years (that is, not until 1808). In exchange for this concession, the federal government's power to regulate foreign commerce would be strengthened by provisions that allowed for taxation of slave trades in the international market and that reduced the requirement for passage of navigation acts from two-thirds majorities of both houses of Congress to simple majorities. what happened to the slave trade in it? Slave trade was allowed to continue and Congress could only ban it  after 1808..
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Constitutional Convention (United States) [SEP] Amendments and ratification
The delegates recognized that a major flaw with the Articles of Confederation was that any constitutional amendment required unanimous approval of the states. On July 23, the convention endorsed the need for a different way of amending the Constitution, but it was not prepared to vote on specifics. It also discussed how the completed Constitution would become law. Oliver Ellsworth and William Paterson argued that state legislatures should ratify the Constitution to align with precedent under the Articles of Confederation and because the legislatures represented the will of the people. Nathaniel Gorham argued that state legislators would reject the Constitution to protect their own power.