Add in the fact that the Muslim world already had the Silk Road, and in general pretty strong connections with the Far East were long established. Meanwhile, the Chinese and other Far Easterners were far more concerned with their particular localities ("cooked barbarians" over "raw" ones, and all that good stuff), and as such weren't very interested in bypassing the Middle Eastern trade hub (and weren't very interested in anything outside of the Middle Kingdom and environs in the first place).
That, opposed to the lack of such ideas in Europe; the Europeans were also very interested in bypassing the Middle East, which was largely controlled by a powerful and aggressive enemy of theirs: the Ottomans.
Bookmarks