DUBAI, Aug 31 (Reuters) - Abu Dhabi's Al Jaber Group plans to raise as much as 2.35 billion dirhams ($640 million) from the sale of its stake in a construction company and by using a prime hotel in the emirate as collateral for a loan, sources familiar with the matter said.

The moves are part of an attempt by the family conglomerate to agree a new restructuring deal with creditors after missing a payment on its existing $4.5 billion debt plan in March.

Creditors of the group, best known for construction but with interests in other sectors, are studying the proposed debt plan, with four sources indicating they are confident an agreement could be in place by year-end.

A spokesman for Al Jaber, which borrowed extensively at the end of the last decade to expand only to be caught out by an economic slowdown, declined to comment.

($1 = 3.6726 UAE dirham)

(Reporting by Tom Arnold, David French and Hadeel Al Sayegh; Additional Reporting by Stanley Carvalho in Abu Dhabi; Editing by Louise Heavens) ((davidj.french@thomsonreuters.com; +971 4 362 5864; Reuters Messaging: davidj.french.thomsonreuters.com@reuters.net))