Officials from Greece and its international lenders are reported to be negotiating with banks on possible higher writedowns in a debt swap as part of a proposed bail-out package for Greece.
Reuters quoted a Greek finance ministry source as saying that the talks were going on parallel to a meeting of euro zone finance ministers in Brussels.
The ministers are having talks aimed at agreeing the terms of a massive bail-out for Greece, the second in almost two years.
Under the key bond swap element of the deal, Greece was to have around €100 billion of debt written off via a restructuring involving private sector holders of Greek government bonds.
Greek Finance Minister Evangelos Venizelos said on arrival that he was "optimistic" about a deal and IMF chief Christine Lagarde praised Athens' "great efforts" to overhaul its economy.
Minister Of State Brian Hayes, who is representing Ireland in place of Finance Minister Michael Noonan, said that now was the time to get the issue of the Greek bail-out "over the line" and he was confident this would happen.
He said the issue had "bedevilled" euro zone negotiations over the past year, and 2012 should herald a move towards a new agenda of jobs and growth.
But hardline Dutch finance minister Jan Kees De Jager demanded that the EU and IMF take "permanent" control of government decision-making over revenues and public expenditure in Greece. De Jager said partners committed to providing Greece money for years to come need "some kind of permanent presence" dictating policy on the ground.
At stake in the rescue of Greece is a writedown of privately-held government debt worth €100 billion as well as guarantees and loans eventually adding up to another €130 billion.
Ireland one of 11 calling for growth measures
The Taoiseach has signed a joint letter with 10 other EU member states calling for greater use of trade and liberalising services to boost growth across the European Union.
The letter has been sent to the presidents of the European Council and Commission ahead of next week's summit of EU leaders in Brussels.
The other signatories are mainly from Scandinavian and Baltic member states, euro zone creditor countries, and the UK. Neither Germany nor France have participated in the letter.
The joint letter calls for quicker action to deepen the EU's single market, its services sector and its internal energy market, and calls for a digital single market by 2015. There is an emphasis on deepening trading links with third countries.
"This year we should conclude free trade agreements with India, Canada, countries of the Eastern neighbourhood and a number of ASEAN partners," the letter reads. "We should also reinforce trade relations with countries in the southern neighbourhood [ie North Africa]. Fresh impetus should be given to trade negotiations with strategic partners such as Mercosur and Japan, with negotiations with Japan launched before the summer, provided there is progress on the scope and ambition of a free trade agreement. The deals that are currently on the table could add €90 billion to EU GDP," the letter says.
