function foobar(){
            asynch();
            synch();
            asynch2();
        };

        generates into something like that

        var promise;
        var promise2;
        var promise3;

        promise = new Promise(function(resolve, reject) {
            asynch(function(){
                promise.resolve();
            });
        });

        promise.then(function(val) {
            promise2 = new Promise(function(resolve, reject) {
                synch(function(){
                    promise2.resolve();