Can not find module by Lazy loading in angular2 es5 - lazy-loading

Question

I am wirting an app with Angular 2 in EcmaScript 5. By Implementing of "Lazy Loading" I get this error message:
Can not find 'DetailModule'.
That are my /src/app/app.module.js
var ngCore = require('#angular/core'),
platformBrowser = require('#angular/platform-browser'),
router = require('#angular/router');
var AppComponent = require('my-app/app/app.component.js');
var ListComponent = require('my-app/list/list.component.js');
var appRoutes = [
{ path: '', component: ListComponent },
{ path: 'detail', loadChildren: "detail/detail.module.js#DetailModule"}
];
MyAppModule = ngCore.NgModule({
imports: [
platformBrowser.BrowserModule,
router.RouterModule.forRoot(appRoutes)
],
declarations: [ AppComponent, ListComponent ],
bootstrap: [ AppComponent ]
}).Class({
constructor: function (){
}
});
module.exports = MyAppModule;
This is my detail.module.js:
var ngCore = require('#angular/core'),
router = require('#angular/router');
var ListComponent = require('my-app/list/list.component.js'),
DetailComponent = require('my-app/detail/detail.component.js');
var routes = [
{ path: '', component: DetailComponent }
];
var routing = router.RouterModule.forChild(routes);
var module = ngCore.NgModule({
imports: [ routing ],
declarations: [ DetailComponent, ListComponent ]
}).Class({
constructor: function (){
}
});
module.exports = {
DetailModule: module
};
How I to export the module with ES5, so that angular2 detect is?