Method for producing polycarbonate

A method for producing a polycarbonate,

• the method comprising the step of irradiating a light to a composition comprising a C1-4 halogenated hydrocarbon, a diol compound and a base in the presence of oxygen,
• wherein the base is pyridine, picoline or lutidine, and
• wherein the diol compound is any one of the compounds represented by the following formulae (I1) to (I6):
• wherein
• R1 and R2 are independently —(CR5R6)q1— or —(—O—(CR5R6)q2—)q3—wherein R5 and R6 are independently H or a C1-6 alkyl group, q1 is an integer of 0 or more and 10 or less, q2 is an integer of 1 or more and 10 or less, q3 is an integer of 1 or more and 10 or less, and when q1 or q2 is an integer of 2 or more, a plurality of R5 or R6 may be the same as or different from each other,
• R3 and R4 are independently one or more halogeno groups selected from the group consisting of chloro, bromo and iodo, a C1-20 aliphatic hydrocarbon group, a C1-20 alkoxy group, a C3-20 cycloalkyl group, a C6-20 aromatic hydrocarbon group, a C7-20 aralkyl group, a C6-20 aromatic hydrocarbon oxy group or a C3-20 cycloalkoxy group,
• X1 is the following group:
• wherein
• R7 and R8 are independently H, one or more halogeno groups selected from the group consisting of chloro, bromo and iodo, a C1-20 aliphatic hydrocarbon group optionally having a substituent a, a C1-20 alkoxy group optionally having a substituent α, a C6-20 aromatic hydrocarbon group optionally having a substituent β, or R7 and R8 may bind together to form a C3-20 carbon ring or a 5-12 membered hetero ring,
• R9 and R10 are independently H or a C1-6 alkyl group, and when r1 is an integer of 2 or more, a plurality of R9 or R10 may be the same as or different from each other,
• R11 to R18 are independently one or more halogeno groups selected from the group consisting of chloro, bromo and iodo, a C1-20 aliphatic hydrocarbon group optionally having a substituent α, a C1-20 alkoxy group optionally having a substituent α, or a C6-12 aromatic hydrocarbon group optionally having a substituent β,
• R19 is a C1-9 alkylene group optionally having a substituent α,
• r1 is an integer of 1 or more and 20 or less,
• r2 is an integer of 1 or more and 500 or less,
• p1 and p2 are independently integers of 0 or more and 4 or less,
• substituent α is one or more substituents selected from the group consisting of a C1-6 alkoxy group, a C1-7 acyl group, one or more kinds of halogeno groups selected from the group consisting of chloro, bromo and iodo, an amino group, a nitro group, a cyano group and a carbamoyl group,
• substituent β is one or more substituents selected from the group consisting of a C1-6 alkyl group, a C1-6 alkoxy group, a C1-7 acyl group, one or more kinds of halogeno groups selected from the group consisting of chloro, bromo and iodo, an amino group, a nitro group, a cyano group and a carbamoyl group,
• wherein R1 and R2 have the same meanings as the above, and X2 has the same meaning as X1,
• HO—R1—X3—R2—OH(I3)
• wherein R1 and R2 have the same meanings as the above, and X3 is a C15-32 divalent aromatic hydrocarbon group,
• HO—R20—X4—R21—OH(I4)
• wherein R20 and R21 are independently-(CR5R6)m1— or —(—O—(CR5R6)m2—)m3—, wherein R5 and R6 have the same meanings as the above, m1 is an integer of 1 or more and 10 or less, m2 is an integer of 1 or more and 10 or less, m3 is an integer of 1 or more and 10 or less, and when m1 or m2 is an integer of 2 or more, a plurality of R5 or Re may be the same as or different from each other, and X4 is a divalent group comprising one or more hydrocarbon rings or hetero ring,
• HO—R1—X5—R2—OH (I5)
• wherein R1 and R2 have the same meanings as the above, and X5 is a divalent saturated heterocycle group,
• wherein X6 is a C1-10 alkylene group, and n is an integer of 13 or more and 50 or less.