Liquid crystal compound having benzopyran skeleton, liquid crystal composition, and liquid crystal display device

A liquid crystal composition, containing at least one compound represented by formula (1) as component (a):

• wherein, in formula (1),
• R1 and R2 are independently hydrogen, alkyl having 1 to 16 carbons, alkenyl having 2 to 16 carbons, cyclopropyl, cyclobutyl or cyclopentyl, and in the alkyl and the alkenyl, at least one piece of —CH2— may be replaced by —O—, —S—, —CO—, —COO—, —OCO—, —OCOO—, —C≡C—, cyclopropane-1,2-diyl or —Si(CH3)2—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine, and in the groups, at least one piece of —CH3 may be replaced by any one of monovalent groups (G1) to (G4) below;
• wherein, in groups (G1) to (G4),
• R3 is alkyl having 1 to 12 carbons or alkenyl having 2 to 12 carbons, and in the alkyl and the alkenyl, at least one piece of —CH2— may be replaced by —O—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine;
• and
• in formula (1),
• ring A1 and ring A2 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, decahydronaphthalene-2,6-diyl, tetrahydronaphthalene-2,6-diyl or naphthalene-2,6-diyl, and in the groups, one or two pieces of —CH2— may be replaced by —O—, —S—, —CO—, —CF2—, —SiH2— or —Si(CH3)2—, and one or two pieces of —CH2CH2— may be replaced by —CH═CH— or —CH═N—, and in the groups, at least one hydrogen on an aromatic ring may be replaced by halogen, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, —OCH2F, or —C≡N;
• Z1 and Z2 are independently a single bond or alkylene having 1 to 4 carbons, and one piece of —CH2— may be replaced by —O— or —CO—, and at least one piece of —CH2CH2— may be replaced by —CH═CH— or —C≡C—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine;
• X, L and L2 are independently hydrogen or halogen;
• Y is —CO— or —CF2—;
• and
• a and b are independently 0, 1 or 2.