Jesus was giving a little history lesson here...And, a little bit of prophecy as well...
Luk 11:50 That the blood of all the prophets, which was shed from the foundation of the world, may be required of this generation;
Luk 11:51 From the blood of Abel unto the blood of Zacharias, which perished between the altar and the temple: verily I say unto you, It shall be required of this generation.
If one takes an interest, he/she can find Abel in the book of Genesis, the first book of the Protestant bible...Zacharias will be found in II Chronicles which is the LAST BOOK OF THE JEWISH BIBLE...
Luk 24:44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.
And here, Jesus tell us what was between the beginning and end of the OT scriptures...
You see any of your extr biblical Catholic books in there???
No, actually he isn't. That's something you're reading into the text.
You might note that none of the OT deuterocanon is prophetic literature (like, e.g., Isaiah); it's all either wisdom literature or historical. Hence, none of its authors were prophets, (and none, AFAIK, were martyred), hence none of them could be classed with the "blood of all the prophets".
The passage says nothing about the OT canon, which is a concept which didn't even really exist at that time. (The formal Jewish condemnation of the OT deuterocanon took place after AD 135.) The closest thing to it would be the books that were translated in the Septuagint (which is the Greek Bible the NT authors quote, often word for word), which included the OT deuterocanon.
***If one takes an interest, he/she can find Abel in the book of Genesis, the first book of the Protestant bible...Zacharias will be found in II Chronicles which is the LAST BOOK OF THE JEWISH BIBLE...***
The Jewish Council of Jamnia, irritated at the encroachment of the Christians determined a new version of the OT approximately 60 years after Christ died and was resurrected.
Our OT is derived in part from the Septuagint which had all the proper verse.