Umm no, you’ve got it wrong; the Sadducees rejected the oral interpretation of the Torah promulgated by the Pharisees, which after the destruction of the Second Temple and the expulsion of Jews from Jerusalem and the former province of Judaea after the failed Bar Kochba revolt in 130, began to be compiled into the Mishnah. The Rabinnical Jews inherited the oral traditions of the Pharisees, while the Sadducees, Hellenic Jews, Essenes and Zealots became extinct. The Mishnah itself was then compiled into the Babylonian Talmud (which is considered authoritative by Orthodox Jews at present) and the Jerusalem Talmud, by the Jews living in Seleucia-Cstesiphon and the former province of Judaea respectively, based on the prevailing traditions in their respective countries.
The Karaites arose as a separate faction which rejected the Mishnah and the Talmud, and they are likened to the Sadducees by many historic Rabinnical Jewish figured, but there is no historical connection between the two.
The Sadducees, like the Karaites, did not have a problem with the other books of the Tanakh; rather, they simply regarded the five books of the Torah as the sole extent of the Law, rejecting the oral traditions of the Pharisees regarding the correct interpretation of the Law. They differed from the Karaites in that they did not believe in the physical resurrection of the dead.
It should be noted by the way, that it is a common error some Protestants make, which is derived from a misinterpretation of Martin Luther’s Law and Gospel dichotomy* to think of the Old Testament entire as “the Law.” Our Lord Himself distinguishes between the Law and Prophets. So you have in the Tanakh, which we call the Old Testament the Pentateuch, or Torah, and then the books of history like Joshua, Judges, Kingdoms, Samuel, and so on, and then the Psalms, and the Wisdom writing of Solomon (Proverbs, the Song of Songs, Ecclessiastes), and then the Prophets. The Jews group five books together, including some of the books of Solomon, Esther, Ruth and Lamentations, in the Megillot, or “Five Scrolls” which are chanted in a distinct way. Then you have the Deuterocanonical books, rejected by the Pharisees and their successors, the Rabinnical Jews, and the Karaites, but not the other Jews of the second temple period. including the Beta Israel - the Ethiopian Jews, or rather, at the time, simply the Ethiopians, as Ethiopia was ruled by Hebraic monarchs of the House of Solomon and was effectively a Jewish state, until it converted to Christianity in the early fourth century. Indeed, the Sadducees accepted some Deuterocanonical works, such as The Wisdom of Sirach (Ecclesiasticus), as documented here:
Sadducees, Zadokites, and the Wisdom of Ben Sira
The Beta Israel, together with the Pharisees, the Samaritans, the followers of John the Baptist who eventually intermarried with Mesopotamian Gnostics and survive as the Mandaeans, and the Jewish converts to Christianity, who to this day comprise a large portion of the Antiochian Orthodox, Syriac Orthodox, Melkite Catholic, Syriac Catholic, Alexandrian Greek Orthodox, the Palestinian members of the Greek Orthodox Patriarchate of Jerusalem, and the St. Thomas Christians or Nasranis of Kerala, Malankara and the Malabar Coast, were the only major surviving Hebraic ethnoreligious groups after the Bar Kochba revolt of 130 AD.
The only Hebraic group at the time of our Lord that only accepted the five books of the Law, the Torah or Pentateuch, was the Samaritans, and their version of the Torah is corrupted with interpolations commanding worship at Mount Gerizim. They also at some point produced their own Book of Joshua, but like the Jews, do not regard it as being part of the Law per se.
Now, the Sadducees were themselves named for Zadok the Priest, from whom several were descended; the majority of priests in the Second Temple, and much of the Sanhedrin, was comprised of Sadducees. They were enthusiastic supporters of the reforms of Ezra and Nehemiah, who introduced the reading of the Torah on the Sabbath in synagogues; before Second Temple Judaism, during the Kingdom, the majority of Hebrews only heard the Torah annually during Sukkot, the Festival of Booths, in which the people of Israel assembled in Jerusalem in tabernacles to hear certain parts of the Torah found in the book Deuteronomy read to them by the King.
Given that the Sadducees accepted Sirach, a book rejected by the Pharisees, it seems to me entirely likely that they would accept 1 Enoch, as this book is known to have been part of the scriptures in use by the broader Jewish community during the Second Temple period, and indeed, it has always been used by the Ethiopian Jews and the Ethiopian and Eritrean Orthodox Christians. And since the Ethiopian Jews still have their priests perform animal sacrifices, it seems entirely possible there is a connection between them and the Sadducees.
* If interpreted in an extremely literal way, Luther’s Law and Gospel model would be a false dichotomy, but its rather more of a concept Luther used to explain the Pauline epistles in preaching the doctrine of Sola Fide, and also before he began teaching Sola Fide, in preaching against a certain crypto-Pelagianism in the Roman Catholic Church which had begun to form after the schism with the Orthodox, and which was subsequently rectified in the internal reforms associated with the Council of Trent, the Counter Reformation and Pope Pius V. Much of what Luther said would indeed be erroneous if taken literally, for example, his remark about sinning boldly.