Fluoropolyether group-containing compound

A method for producing a fluoropolyether group-containing compound comprising:

• a compound of the following formula (1a) or (1b):
• and a compound of the following formula (2c):
• H—C≡C—X2-A2R213 (2c)
• are added with an organic lithium to obtain the fluoropolyether group-containing compound of formula (2a) or formula (2b):
• wherein
• RF1 is each independently at each occurrence Rf1—RF—Oq—;
• RF2 is —Rf2p—RF—Oq—;
• Rf1 is each independently at each occurrence a C1-16 alkyl group optionally substituted with one or more fluorine atoms;
• Rf2 is a C1-6 alkylene group optionally substituted with one or more fluorine atoms;
• RF is each independently at each occurrence a divalent fluoropolyether group;
• p is 0 or 1;
• q is each independently at each occurrence 0 or 1;
• and
• R1 and R2, each independently at each occurrence, are an alkyl group or an alkoxy group having 1 to 10 carbon atoms, or together form a group having a ring structure which is a 5 to 10-membered heterocyclic ring, or together form a group having a ring structure which is a condensed ring containing a 5 to 10-membered heterocyclic ring, wherein the alkyl group, the alkoxy group and the group having the ring structure may be substituted;
• X2 is a divalent organic group;
• A2 is each independently at each occurrence C or Si;
• and
• R21 is each independently a hydrocarbon group having at least one carbon-carbon double bond.