L-Glu(Otbu) -Otbu-OH

A ṣe Ester lati inu ifaseyin esterization ti inorganic acid tabi Organic acid tabi oti.Ọtí tabi phenol tabi ekikan anhydride, oti ati ethylene, free acidic acid ati ọra nitrogen itọsẹ tun le se ina ester.Awọn hydrogen lori alpha-erogba ninu awọn moleku ester padanu oti molikula kan pẹlu ester molikula miiran labẹ awọn ipo ipilẹ lati ṣe ipilẹṣẹ β-keto ester, eyiti a pe ni iṣesi ihamọ ester.Fun apẹẹrẹ, acetyl acetate ti wa ni ipilẹṣẹ lati ṣe ipilẹṣẹ acetyl ethyl acetate.Ihuwasi yii jẹ pataki pupọ ninu iṣelọpọ Organic.

Orukọ ester naa wa lati orukọ ti o baamu ti carboxylic acid ati oti tabi phenol, gẹgẹbi “acid kan ati ester kan”.Circle esters ni a npe ni lactone (lactone).Awọn ohun-ini kemikali ti ester jẹ iru si amyl niche anhydride, eyiti o ni itara si hydrolysis, ọti-lile ati amonia lenu.Ester-kekere jẹ oorun didun ati omi ti ko ni iyipada, ati ester to ti ni ilọsiwaju jẹ to lagbara.Estes jẹ awọn olomi pataki ati awọn ohun elo aise sintetiki, ati diẹ ninu awọn esters jẹ oogun funrararẹ.Ni ibamu si iru acid, ester le pin si inorganic acid ester ati Organic acid ester.Etate, ethyl acetate jẹ ester ọra, acetate jẹ ester aromatic, ati namanonate jẹ ester cyclic.