The Oscorp building's address is most likely 1180 Avenue of the Americas (6th Avenue between 46th and 47th St). It might also be one block north at 1212 Avenue of the Americas (6th Avenue between 47th and 48th St.).
The best shot is at the time stamp 00:39:05. I took a screen shot and marked a few buildings that I know (and used Apple Maps 3D on my iPad to get the address). The Oscorp building appears to be one block north and on the same side of 6th Avenue as #5 (on the east side of the avenue). It is also 2-3 blocks south of #1 and 1-2 blocks south of #2 (both also on the east side of 6th avenue). The MetLife building is also in the foreground at the far right. It appears to be a couple of streets south of the Oscorp building (which makes since because 44th St. would go right through the MetLife building).
1) 1258 Avenue of the Americas (6th Avenue between 49th and 50th)
2) 1230 Avenue of the Americas (6th Avenue between 48th and 49th)
3) 500 5th Avenue (between 42nd and 49th)
4) 1114 Avenue of the Americas (6th Avenue between 42nd and 43rd)
5) 1160 Avenue of the Americas (6th Avenue between 45th and 46th)
At time stamp 1:47:58 the news says that there is a city-wide evacuation of everything south of 54th street. This makes since because the gas/fighting took place south of Oscorp and then moved north (see next paragraph).
The shootout between the Lizard and the police (where he changes them) (beginning near 01:40:47) is suppose to take place on 6th Avenue (Avenue of the Americas) near a subway that has the BDFM line and the 7 line. For a split second you can see a street sign that says 6th Avenue/Avenue of the Americas. The station the film shot at is different the station it is suppose to be. The only stations that have access to both the BDFM and 7 lines are the Bryant Park stations at 6th Ave. & 41st St. and on 42nd St. between 5th and 6th Ave. Neither of these stations were used in the filming because Bryant Park is nowhere to be seen.
At 01:48:29 the construction worker asks his co-worker: "You still friends with Matthews, that crane operator down on 6th Avenue?" A few seconds later, at 01:49:03, an order goes out over the radio for all tower cranes on 6th to swing out over the avenue.
But there are some inconsistencies:
At 00:14:42 Peter is looking up at the building for the first time and behind him you can clearly see an awning that says, "3 Columbus Circle." 3 Columbus Circle takes up an entire block and is bordered by 8th Avenue, Broadway, 57th, and 58th.
At 01:42:01 Peter comes out of the sewer on his way to the final fight of the movie. He clearly comes out near a Bed Bath & Beyond, but the only 3 near midtown don't make sense for the movie. The most ideal location is near the Lincoln center at Columbus Ave. (aka 9th Ave), Broadway, and 65th St. This is the most ideal because a few minutes later (at 01:49:16), after he is shot and about to ride the cranes, there is a shot of the Oscorp building lit up with searchlights and the cranes are being moved out over 6th Avenue. These are definitely cranes north of the Oscorp building because the Empire State Building (5th Ave between 33rd and 34th St) is seen in the background and to the left of Oscorp (where it would be if Oscorp was on 6th Avenue between 46th - 48th St).